diff --git a/panel-plugin/main.c b/panel-plugin/main.c
index 4c64a13..250347e 100644
--- a/panel-plugin/main.c
+++ b/panel-plugin/main.c
@@ -119,7 +119,7 @@ static int DisplayCmdOutput (struct genmon_t *p_poPlugin)
 
     struct param_t *poConf = &(p_poPlugin->oConf.oParam);
     struct monitor_t *poMonitor = &(p_poPlugin->oMonitor);
-    char   acToolTips[256];
+    char   acToolTips[BUFMAX];
     char   acCompleteCmd[256];
     int    status;
     char  *begin;