diff --git a/nx-X11/programs/Xserver/hw/nxagent/Args.c b/nx-X11/programs/Xserver/hw/nxagent/Args.c
index 9cf77e388f..2f95b61a6d 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Args.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Args.c
@@ -2112,7 +2112,7 @@ static int nxagentGetDialogName()
               sizeof(nxagentDialogName) - 1 - strlen(prefix));
     }
 
-    nxagentSessionId[sizeof(nxagentSessionId) - 1] = '\0';
+    nxagentDialogName[sizeof(nxagentDialogName) - 1] = '\0';
 
     return 1;
   }