diff --git a/reactos/ntoskrnl/mm/ARM3/procsup.c b/reactos/ntoskrnl/mm/ARM3/procsup.c
index b7b7344e4d2..9a0ae20da46 100644
--- a/reactos/ntoskrnl/mm/ARM3/procsup.c
+++ b/reactos/ntoskrnl/mm/ARM3/procsup.c
@@ -699,7 +699,7 @@ MmCreatePeb(IN PEPROCESS Process,
         //
         // Session ID
         //
-        MmGetSessionId(Process);
+        if (Process->Session) Peb->SessionId = MmGetSessionId(Process);
     }
     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
     {