diff --git a/sdk/lib/rtl/slist.c b/sdk/lib/rtl/slist.c
index b4625f15838..6cff6d0ad2f 100644
--- a/sdk/lib/rtl/slist.c
+++ b/sdk/lib/rtl/slist.c
@@ -132,10 +132,10 @@ RtlInterlockedPushListSList(
             NewSListHead.Header16.Init = 1;
 
             /* Atomically exchange the SlistHead with the new one */
-            exchanged = _InterlockedCompareExchange128((PULONG64)SListHead,
+            exchanged = _InterlockedCompareExchange128((PLONG64)SListHead,
                                                        NewSListHead.Region,
                                                        NewSListHead.Alignment,
-                                                       (PULONG64)&OldSListHead);
+                                                       (PLONG64)&OldSListHead);
         } while (!exchanged);
 
         return FirstEntry;