diff --git a/src/video/videobuffer.cpp b/src/video/videobuffer.cpp
index cdaec56..9994874 100644
--- a/src/video/videobuffer.cpp
+++ b/src/video/videobuffer.cpp
@@ -156,6 +156,7 @@ void getALPRImages(cv::VideoCapture cap, VideoDispatcher* dispatcher)
     while (dispatcher->active)
     {
       
+      dispatcher->mMutex.lock();
       bool hasImage = false;
       try
       {
@@ -163,16 +164,15 @@ 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.