diff --git a/win32ss/user/ntuser/winsta.c b/win32ss/user/ntuser/winsta.c
index 88266ad5bb0..4c91558b497 100644
--- a/win32ss/user/ntuser/winsta.c
+++ b/win32ss/user/ntuser/winsta.c
@@ -128,6 +128,8 @@ IntWinStaObjectDelete(
 
     RtlDestroyAtomTable(WinSta->AtomTable);
 
+    UserAssignmentUnlock((PVOID*)&WinSta->spklList);
+
     return STATUS_SUCCESS;
 }