diff --git a/reference/image/functions/imagepalettetotruecolor.xml b/reference/image/functions/imagepalettetotruecolor.xml
index af759f57ee..43fda98652 100644
--- a/reference/image/functions/imagepalettetotruecolor.xml
+++ b/reference/image/functions/imagepalettetotruecolor.xml
@@ -61,6 +61,8 @@ if(!function_exists('imagepalettetotruecolor'))
 		imagedestroy($src);
 
 		$src = $dst;
+
+		return(true);
 	}
 }