diff --git a/ntoskrnl/ps/query.c b/ntoskrnl/ps/query.c
index 968b24623ef..895c2db5d0d 100644
--- a/ntoskrnl/ps/query.c
+++ b/ntoskrnl/ps/query.c
@@ -2469,6 +2469,7 @@ NtSetInformationThread(IN HANDLE ThreadHandle,
             {
                 /* Fail */
                 Status = STATUS_INVALID_PARAMETER;
+                ObDereferenceObject(Thread);
                 break;
             }