diff --git a/src/video/videobuffer.cpp b/src/video/videobuffer.cpp
index d9daa35..5a17391 100644
--- a/src/video/videobuffer.cpp
+++ b/src/video/videobuffer.cpp
@@ -154,7 +154,6 @@ void getALPRImages(cv::VideoCapture cap, VideoDispatcher* dispatcher)
     while (dispatcher->active)
     {
       
-      dispatcher->mMutex.lock();
       bool hasImage = false;
       try
       {
@@ -162,15 +161,16 @@ void getALPRImages(cv::VideoCapture cap, VideoDispatcher* dispatcher)
 	// Double check the image to make sure it's valid.
 	if (!frame.data || frame.empty())
 	{
-	  dispatcher->mMutex.unlock();
 	  std::stringstream ss;
 	  ss << "Stream " << dispatcher->mjpeg_url << " received invalid frame";
 	  dispatcher->log_error(ss.str());
 	  return;
 	}
 	
+	dispatcher->mMutex.lock();
 	dispatcher->setLatestFrame(&frame);
-      }
+	dispatcher->mMutex.unlock();
+	  }
       catch (const std::runtime_error& error)
       {
 	// Error occured while trying to gather image.  Retry, don't exit.