diff --git a/source/blender/editors/screen/screen_ops.c b/source/blender/editors/screen/screen_ops.c
index 87716190994..1a0ae95dfe0 100644
--- a/source/blender/editors/screen/screen_ops.c
+++ b/source/blender/editors/screen/screen_ops.c
@@ -1301,7 +1301,14 @@ typedef struct RegionMoveData {
 static int region_scale_invoke(bContext *C, wmOperator *op, wmEvent *event)
 {
 	sActionzoneData *sad= event->customdata;
-	AZone *az= sad->az;
+	AZone *az;
+	
+	if(event->type!=EVT_ACTIONZONE_AREA) {
+		BKE_report(op->reports, RPT_ERROR, "Can only scale region size from an action zone");	
+		return OPERATOR_CANCELLED;
+	}
+	
+	az = sad->az;
 	
 	if(az->ar) {
 		RegionMoveData *rmd= MEM_callocN(sizeof(RegionMoveData), "RegionMoveData");