diff --git a/reactos/win32ss/user/ntuser/main.c b/reactos/win32ss/user/ntuser/main.c
index 4ca68ae7286..f9aed03b77e 100644
--- a/reactos/win32ss/user/ntuser/main.c
+++ b/reactos/win32ss/user/ntuser/main.c
@@ -708,6 +708,8 @@ ExitThreadCallback(PETHREAD Thread)
     ptiCurrent->TIF_flags |= TIF_DONTATTACHQUEUE;
     ptiCurrent->pClientInfo->dwTIFlags = ptiCurrent->TIF_flags;
 
+    UserCloseClipboard();
+
     /* Decrement thread count and check if its 0 */
     ppiCurrent->cThreads--;