diff --git a/src/popupwin.c b/src/popupwin.c
index 0f6166a..7478527 100644
--- a/src/popupwin.c
+++ b/src/popupwin.c
@@ -383,8 +383,8 @@
     typval_T	    tv;
 
     vim_snprintf((char *)cbbuf, sizeof(cbbuf),
-				       "{_ -> popup_close(%d)}", wp->w_id);
-    if (get_lambda_tv(&ptr, &tv, FALSE, &EVALARG_EVALUATE) == OK)
+				       "(_) => popup_close(%d)", wp->w_id);
+    if (get_lambda_tv_and_compile(&ptr, &tv, FALSE, &EVALARG_EVALUATE) == OK)
     {
 	wp->w_popup_timer = create_timer(time, 0);
 	wp->w_popup_timer->tr_callback = get_callback(&tv);