diff --git a/source/blender/src/sequence.c b/source/blender/src/sequence.c
index 1564dbce14a..6c2c97518c4 100644
--- a/source/blender/src/sequence.c
+++ b/source/blender/src/sequence.c
@@ -1486,11 +1486,13 @@ void RVIsolateHighlights (unsigned char* in, unsigned char* out, int width, int
 			out[index+GlowR]=MIN2(255*clamp, (in[index+GlowR]*boost*intensity)/255);
 			out[index+GlowG]=MIN2(255*clamp, (in[index+GlowG]*boost*intensity)/255);
 			out[index+GlowB]=MIN2(255*clamp, (in[index+GlowB]*boost*intensity)/255);
+			out[index+GlowA]=in[index+GlowA];
 			}
 			else{
 				out[index+GlowR]=0;
 				out[index+GlowG]=0;
 				out[index+GlowB]=0;
+				out[index+GlowA]=0;
 			}
 		}
 	}