diff --git a/src/main.c b/src/main.c
index ec83d8f..885192b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1051,7 +1051,7 @@
     int		noexmode;   /* TRUE when return on entering Ex mode */
 {
     oparg_T	oa;				/* operator arguments */
-    int		previous_got_int = FALSE;	/* "got_int" was TRUE */
+    volatile int previous_got_int = FALSE;	/* "got_int" was TRUE */
 #ifdef FEAT_CONCEAL
     linenr_T	conceal_old_cursor_line = 0;
     linenr_T	conceal_new_cursor_line = 0;