diff --git a/src/openalpr/alpr.h b/src/openalpr/alpr.h
index b2e6fa0..5068d67 100644
--- a/src/openalpr/alpr.h
+++ b/src/openalpr/alpr.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef ALPR_H
-#define ALPR_H
+#ifndef OPENALPR_ALPR_H
+#define OPENALPR_ALPR_H
 
 #include <iostream>
 #include <vector>
@@ -83,4 +83,4 @@ class Alpr
     AlprImpl* impl;
 };
 
-#endif // APLR_H
+#endif // OPENALPR_APLR_H
diff --git a/src/openalpr/alpr_impl.h b/src/openalpr/alpr_impl.h
index 196e387..eb54cd0 100644
--- a/src/openalpr/alpr_impl.h
+++ b/src/openalpr/alpr_impl.h
@@ -18,8 +18,8 @@
 */
 
 
-#ifndef ALPRIMPL_H
-#define ALPRIMPL_H
+#ifndef OPENALPR_ALPRIMPL_H
+#define OPENALPR_ALPRIMPL_H
 
 #include <list>
 #include <sstream>
@@ -163,4 +163,4 @@ class PlateDispatcher
 
 };
 
-#endif // ALPRIMPL_H
\ No newline at end of file
+#endif // OPENALPR_ALPRIMPL_H
\ No newline at end of file
diff --git a/src/openalpr/binarize_wolf.h b/src/openalpr/binarize_wolf.h
index b693265..2adf00c 100644
--- a/src/openalpr/binarize_wolf.h
+++ b/src/openalpr/binarize_wolf.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef BINARIZEWOLF_H
-#define BINARIZEWOLF_H
+#ifndef OPENALPR_BINARIZEWOLF_H
+#define OPENALPR_BINARIZEWOLF_H
 
 #include "support/filesystem.h"
 
@@ -47,4 +47,4 @@ enum NiblackVersion
 void NiblackSauvolaWolfJolion (Mat im, Mat output, NiblackVersion version,
                                int winx, int winy, float k);
 
-#endif // BINARIZEWOLF_H
+#endif // OPENALPR_BINARIZEWOLF_H
diff --git a/src/openalpr/characteranalysis.h b/src/openalpr/characteranalysis.h
index be0980b..c1e1dfc 100644
--- a/src/openalpr/characteranalysis.h
+++ b/src/openalpr/characteranalysis.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CHARACTERANALYSIS_H
-#define CHARACTERANALYSIS_H
+#ifndef OPENALPR_CHARACTERANALYSIS_H
+#define OPENALPR_CHARACTERANALYSIS_H
 
 #include "opencv2/imgproc/imgproc.hpp"
 #include "constants.h"
@@ -91,4 +91,4 @@ class CharacterAnalysis
 
 };
 
-#endif // CHARACTERANALYSIS_H
+#endif // OPENALPR_CHARACTERANALYSIS_H
diff --git a/src/openalpr/characterregion.h b/src/openalpr/characterregion.h
index e20756a..902c2a9 100644
--- a/src/openalpr/characterregion.h
+++ b/src/openalpr/characterregion.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CHARACTERREGION_H
-#define CHARACTERREGION_H
+#ifndef OPENALPR_CHARACTERREGION_H
+#define OPENALPR_CHARACTERREGION_H
 
 #include "opencv2/imgproc/imgproc.hpp"
 #include "constants.h"
@@ -78,4 +78,4 @@ class CharacterRegion
 
 };
 
-#endif // CHARACTERREGION_H
+#endif // OPENALPR_CHARACTERREGION_H
diff --git a/src/openalpr/charactersegmenter.h b/src/openalpr/charactersegmenter.h
index 511a47e..1e9ea99 100644
--- a/src/openalpr/charactersegmenter.h
+++ b/src/openalpr/charactersegmenter.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CHARACTERSEGMENTER_H
-#define CHARACTERSEGMENTER_H
+#ifndef OPENALPR_CHARACTERSEGMENTER_H
+#define OPENALPR_CHARACTERSEGMENTER_H
 
 #include "opencv2/imgproc/imgproc.hpp"
 #include "constants.h"
@@ -98,4 +98,4 @@ class CharacterSegmenter
     vector<Point> getEncapsulatingLines(Mat img, vector<vector<Point> > contours, vector<bool> goodIndices);
 };
 
-#endif // CHARACTERSEGMENTER_H
+#endif // OPENALPR_CHARACTERSEGMENTER_H
diff --git a/src/openalpr/colorfilter.h b/src/openalpr/colorfilter.h
index 1e51201..b617583 100644
--- a/src/openalpr/colorfilter.h
+++ b/src/openalpr/colorfilter.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef COLORFILTER_H
-#define COLORFILTER_H
+#ifndef OPENALPR_COLORFILTER_H
+#define OPENALPR_COLORFILTER_H
 
 #include <iomanip>
 #include "opencv2/imgproc/imgproc.hpp"
@@ -56,4 +56,4 @@ class ColorFilter
     int getMajorityOpinion(vector<float> values, float minPercentAgreement, float maxValDifference);
 };
 
-#endif // COLORFILTER_H
+#endif // OPENALPR_COLORFILTER_H
diff --git a/src/openalpr/config.h b/src/openalpr/config.h
index 20fed74..ad74e34 100644
--- a/src/openalpr/config.h
+++ b/src/openalpr/config.h
@@ -18,8 +18,8 @@
 */
 
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#ifndef OPENALPR_CONFIG_H
+#define OPENALPR_CONFIG_H
 
 
 #include "simpleini/simpleini.h"
@@ -129,4 +129,4 @@ private:
 };
 
 
-#endif // CONFIG_H
\ No newline at end of file
+#endif // OPENALPR_CONFIG_H
\ No newline at end of file
diff --git a/src/openalpr/constants.h b/src/openalpr/constants.h
index 30e21b5..497dbd8 100644
--- a/src/openalpr/constants.h
+++ b/src/openalpr/constants.h
@@ -16,6 +16,10 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
+#ifndef OPENALPR_CONSTANTS_H
+#define OPENALPR_CONSTANTS_H
+
+
 #define OPENALPR_MAJOR_VERSION 1
 #define OPENALPR_MINOR_VERSION 1
 #define OPENALPR_PATCH_VERSION 0
@@ -30,3 +34,5 @@
 #endif
 
 #define ENV_VARIABLE_RUNTIME_DIR "OPENALPR_RUNTIME_DIR"
+
+#endif // OPENALPR_CONSTANTS_H
\ No newline at end of file
diff --git a/src/openalpr/featurematcher.h b/src/openalpr/featurematcher.h
index 1af3b92..1f5bf3c 100644
--- a/src/openalpr/featurematcher.h
+++ b/src/openalpr/featurematcher.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef FEATUREMATCHER_H
-#define FEATUREMATCHER_H
+#ifndef OPENALPR_FEATUREMATCHER_H
+#define OPENALPR_FEATUREMATCHER_H
 
 #include "opencv2/calib3d/calib3d.hpp"
 #include "opencv2/imgproc/imgproc.hpp"
@@ -76,4 +76,4 @@ class FeatureMatcher
 
 };
 
-#endif // FEATUREMATCHER_H
+#endif // OPENALPR_FEATUREMATCHER_H
diff --git a/src/openalpr/licenseplatecandidate.h b/src/openalpr/licenseplatecandidate.h
index b1bab3a..ce64eeb 100644
--- a/src/openalpr/licenseplatecandidate.h
+++ b/src/openalpr/licenseplatecandidate.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef STAGE2_H
-#define STAGE2_H
+#ifndef OPENALPR_LICENSEPLATECANDIDATE_H
+#define OPENALPR_LICENSEPLATECANDIDATE_H
 
 #include <iostream>
 #include <stdio.h>
@@ -72,4 +72,4 @@ class LicensePlateCandidate
 
 };
 
-#endif // STAGE2_H
+#endif // OPENALPR_LICENSEPLATECANDIDATE_H
diff --git a/src/openalpr/ocr.h b/src/openalpr/ocr.h
index ea61657..f3a47c6 100644
--- a/src/openalpr/ocr.h
+++ b/src/openalpr/ocr.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef OCR_H
-#define OCR_H
+#ifndef OPENALPR_OCR_H
+#define OPENALPR_OCR_H
 
 #include <iostream>
 #include <stdio.h>
@@ -56,4 +56,4 @@ class OCR
 
 };
 
-#endif // OCR_H
+#endif // OPENALPR_OCR_H
diff --git a/src/openalpr/platecorners.h b/src/openalpr/platecorners.h
index ce5ddf9..9ff7dd7 100644
--- a/src/openalpr/platecorners.h
+++ b/src/openalpr/platecorners.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef PLATECORNERS_H
-#define PLATECORNERS_H
+#ifndef OPENALPR_PLATECORNERS_H
+#define OPENALPR_PLATECORNERS_H
 
 #include "opencv2/imgproc/imgproc.hpp"
 #include "characterregion.h"
@@ -75,4 +75,4 @@ class PlateCorners
 
 };
 
-#endif // PLATELINES_H
+#endif // OPENALPR_PLATELINES_H
diff --git a/src/openalpr/platelines.h b/src/openalpr/platelines.h
index f95e65d..45fbf9d 100644
--- a/src/openalpr/platelines.h
+++ b/src/openalpr/platelines.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef PLATELINES_H
-#define PLATELINES_H
+#ifndef OPENALPR_PLATELINES_H
+#define OPENALPR_PLATELINES_H
 
 #include "opencv2/highgui/highgui.hpp"
 #include "opencv2/imgproc/imgproc.hpp"
@@ -53,4 +53,4 @@ class PlateLines
     vector<LineSegment> getLines(Mat edges, float sensitivityMultiplier, bool vertical);
 };
 
-#endif // PLATELINES_H
+#endif // OPENALPR_PLATELINES_H
diff --git a/src/openalpr/postprocess.h b/src/openalpr/postprocess.h
index babc12a..d10cd43 100644
--- a/src/openalpr/postprocess.h
+++ b/src/openalpr/postprocess.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef POSTPROCESS_H
-#define POSTPROCESS_H
+#ifndef OPENALPR_POSTPROCESS_H
+#define OPENALPR_POSTPROCESS_H
 
 #include "TRexpp.h"
 #include "constants.h"
@@ -125,4 +125,4 @@ class LetterScores
     vector<float> scores;
 };
 */
-#endif // POSTPROCESS_H
+#endif // OPENALPR_POSTPROCESS_H
diff --git a/src/openalpr/regiondetector.h b/src/openalpr/regiondetector.h
index 867225b..d55aa04 100644
--- a/src/openalpr/regiondetector.h
+++ b/src/openalpr/regiondetector.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef REGIONDETECTOR_H
-#define REGIONDETECTOR_H
+#ifndef OPENALPR_REGIONDETECTOR_H
+#define OPENALPR_REGIONDETECTOR_H
 
 #include <iostream>
 #include <stdio.h>
@@ -62,4 +62,4 @@ class RegionDetector
     vector<PlateRegion> aggregateRegions(vector<Rect> regions);
 };
 
-#endif // REGIONDETECTOR_H
+#endif // OPENALPR_REGIONDETECTOR_H
diff --git a/src/openalpr/stateidentifier.h b/src/openalpr/stateidentifier.h
index d12597d..d6bd731 100644
--- a/src/openalpr/stateidentifier.h
+++ b/src/openalpr/stateidentifier.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef STATEIDENTIFIER_H
-#define STATEIDENTIFIER_H
+#ifndef OPENALPR_STATEIDENTIFIER_H
+#define OPENALPR_STATEIDENTIFIER_H
 
 #include "opencv2/imgproc/imgproc.hpp"
 #include "constants.h"
@@ -47,4 +47,4 @@ class StateIdentifier
 
 };
 
-#endif // STATEIDENTIFIER_H
+#endif // OPENALPR_STATEIDENTIFIER_H
diff --git a/src/openalpr/utility.h b/src/openalpr/utility.h
index c7021ca..f33db31 100644
--- a/src/openalpr/utility.h
+++ b/src/openalpr/utility.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef UTILITY_H
-#define UTILITY_H
+#ifndef OPENALPR_UTILITY_H
+#define OPENALPR_UTILITY_H
 
 #include <iostream>
 #include <stdio.h>
@@ -106,4 +106,4 @@ Rect expandRect(Rect original, int expandXPixels, int expandYPixels, int maxX, i
 
 Mat addLabel(Mat input, string label);
 
-#endif // UTILITY_H
+#endif // OPENALPR_UTILITY_H
diff --git a/src/openalpr/verticalhistogram.h b/src/openalpr/verticalhistogram.h
index 17da429..92c603d 100644
--- a/src/openalpr/verticalhistogram.h
+++ b/src/openalpr/verticalhistogram.h
@@ -17,8 +17,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef VERTICALHISTOGRAM_H
-#define VERTICALHISTOGRAM_H
+#ifndef OPENALPR_VERTICALHISTOGRAM_H
+#define OPENALPR_VERTICALHISTOGRAM_H
 
 #include "opencv2/imgproc/imgproc.hpp"
 
@@ -63,4 +63,4 @@ class VerticalHistogram
     HistogramDirection getHistogramDirection(int index);
 };
 
-#endif // VERTICALHISTOGRAM_H
+#endif // OPENALPR_VERTICALHISTOGRAM_H