diff --git a/src/zm_monitor.cpp b/src/zm_monitor.cpp
index 6678b56b6..1aba5c183 100644
--- a/src/zm_monitor.cpp
+++ b/src/zm_monitor.cpp
@@ -1523,7 +1523,7 @@ bool Monitor::Analyse()
 #endif // ZM_PLUGINS_ON
                     {
                         Event::StringSet zoneSet;
-                        int motion_score = last_motion_score;
+                        unsigned int motion_score = last_motion_score;
                         bool alarm = false;
                         if ( !(image_count % (motion_frame_skip+1) ) )
                         {
@@ -3578,7 +3578,7 @@ unsigned int Monitor::DetectBlack(const Image &comp_image, Event::StringSet &zon
 unsigned int Monitor::DetectMotion( const Image &comp_image, Event::StringSet &zoneSet, unsigned int &score )
 {
     bool alarm = false;
-    unsigned int score = 0;
+    score = 0;
 
     if ( n_zones <= 0 ) return( alarm );
 
diff --git a/src/zm_monitor.h b/src/zm_monitor.h
index 2f74b696f..53b501c9a 100644
--- a/src/zm_monitor.h
+++ b/src/zm_monitor.h
@@ -419,7 +419,7 @@ public:
 		return( camera->PostCapture() );
 	}
 
-	unsigned int DetectMotion( const Image &comp_image, Event::StringSet &zoneSet );
+        unsigned int DetectMotion( const Image &comp_image, Event::StringSet &zoneSet, unsigned int &score );
    // DetectBlack seems to be unused. Check it on zm_monitor.cpp for more info.
    //unsigned int DetectBlack( const Image &comp_image, Event::StringSet &zoneSet );
 	bool CheckSignal( const Image *image );