diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 54e4f07..78460fb 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -1492,7 +1492,7 @@
     buf_T	*buf;
     int		checkall;	/* may abandon all changed buffers */
 {
-    char_u	buff[IOSIZE];
+    char_u	buff[DIALOG_MSG_SIZE];
     int		ret;
     buf_T	*buf2;