diff --git a/reactos/ntoskrnl/ps/thread.c b/reactos/ntoskrnl/ps/thread.c
index d05fc8570a8..38459a32794 100644
--- a/reactos/ntoskrnl/ps/thread.c
+++ b/reactos/ntoskrnl/ps/thread.c
@@ -91,7 +91,7 @@ PspUserThreadStartup(IN PKSTART_ROUTINE StartRoutine,
     }
 
     /* Do we have a cookie set yet? */
-    if (!SharedUserData->Cookie)
+    while (!SharedUserData->Cookie)
     {
         LARGE_INTEGER SystemTime;
         ULONG NewCookie;