1 files changed, 2 insertions, 1 deletions

diff --git a/src/xterm.c b/src/xterm.c
index be456a61a6f..40dbe540903 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -7914,7 +7914,8 @@ x_io_error_quitter (Display *display)
 {
   char buf[256];
 
-  sprintf (buf, "Connection lost to X server `%s'", DisplayString (display));
+  snprintf (buf, sizeof buf, "Connection lost to X server `%s'",
+            DisplayString (display));
   x_connection_closed (display, buf);
   return 0;
 }