diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f1104f6..48e803e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -27,6 +27,10 @@ IF ( NOT DEFINED WITH_DAEMON )
   SET(WITH_DAEMON ON)
 ENDIF()
 
+if ( NOT DEFINED WITH_GPU_DETECTOR )
+  SET(WITH_GPU_DETECTOR OFF)
+ENDIF()
+
 IF (WIN32 AND WITH_DAEMON) 
   MESSAGE(WARNING "Skipping alprd daemon installation, as it is not supported in Windows.")
   SET(WITH_DAEMON OFF)
diff --git a/src/openalpr/CMakeLists.txt b/src/openalpr/CMakeLists.txt
index bfb3b22..6ec14b9 100644
--- a/src/openalpr/CMakeLists.txt
+++ b/src/openalpr/CMakeLists.txt
@@ -61,7 +61,9 @@ install (TARGETS openalpr-static DESTINATION ${CMAKE_INSTALL_PREFIX}/lib)
 install (TARGETS openalpr   DESTINATION    ${CMAKE_INSTALL_PREFIX}/lib)
 
 # Compile GPU detector
-#add_definitions(-DCOMPILE_GPU=1)
+IF ( WITH_GPU_DETECTOR )
+add_definitions(-DCOMPILE_GPU=1)
+ENDIF()
 
 # Add definition for default config file
 add_definitions(-DDEFAULT_CONFIG_FILE="${CMAKE_INSTALL_SYSCONFDIR}/openalpr/openalpr.conf")