diff --git a/coders/wpg.c b/coders/wpg.c
index 6496094989..1796efcd7a 100644
--- a/coders/wpg.c
+++ b/coders/wpg.c
@@ -1839,6 +1839,7 @@ static void WPGInitializeRLE(WPGRLEInfo *rle_info)
 {
   rle_info->count=0;
   rle_info->offset=0;
+  (void) memset(rle_info->pixels,0,sizeof(rle_info->pixels));
 }
 
 static MagickBooleanType WriteWPGImage(const ImageInfo *image_info,Image *image)