diff --git a/source/blender/windowmanager/intern/wm_event_system.c b/source/blender/windowmanager/intern/wm_event_system.c
index b55c68ce029..95c121e7a1f 100644
--- a/source/blender/windowmanager/intern/wm_event_system.c
+++ b/source/blender/windowmanager/intern/wm_event_system.c
@@ -392,11 +392,13 @@ static void wm_operator_reports(bContext *C, wmOperator *op, int retval, int pop
 	if(retval & OPERATOR_FINISHED) {
 		if(G.f & G_DEBUG)
 			wm_operator_print(op); /* todo - this print may double up, might want to check more flags then the FINISHED */
-			
-		/* Report the python string representation of the operator */
-		buf = WM_operator_pystring(C, op->type, op->ptr, 1);
-		BKE_report(CTX_wm_reports(C), RPT_OPERATOR, buf);
-		MEM_freeN(buf);
+		
+		if (op->type->flag & OPTYPE_REGISTER) {
+			/* Report the python string representation of the operator */
+			buf = WM_operator_pystring(C, op->type, op->ptr, 1);
+			BKE_report(CTX_wm_reports(C), RPT_OPERATOR, buf);
+			MEM_freeN(buf);
+		}
 	}
 
 	if (op->reports->list.first) {