diff --git a/src/textprop.c b/src/textprop.c
index b6cae70..d678234 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -920,7 +920,8 @@
 	    }
 	}
     }
-    redraw_buf_later(buf, NOT_VALID);
+    if (rettv->vval.v_number > 0)
+	redraw_buf_later(buf, NOT_VALID);
 }
 
 /*