diff --git a/openbox/session.c b/openbox/session.c
index 2b53784e..bcf80ad0 100644
--- a/openbox/session.c
+++ b/openbox/session.c
@@ -390,6 +390,7 @@ static void sm_save_yourself(SmcConn conn, SmPointer data, gint save_type,
            get messed up from interaction */
         savedata = sm_save_get_data();
     }
+    free(vendor);
 
     if (!SmcRequestSaveYourselfPhase2(conn, sm_save_yourself_2, savedata)) {
         ob_debug_type(OB_DEBUG_SM, "Requst for phase 2 failed\n");