diff --git a/reactos/ntoskrnl/ke/i386/context.c b/reactos/ntoskrnl/ke/i386/context.c
index 5b3345a257a..6cc711befe7 100644
--- a/reactos/ntoskrnl/ke/i386/context.c
+++ b/reactos/ntoskrnl/ke/i386/context.c
@@ -27,8 +27,8 @@ KiSwapProcess(IN PKPROCESS NewProcess,
     
     /* Update active processor mask */
     SetMember = Pcr->SetMember;
-    InterlockedXor(NewProcess->ActiveProcessors, SetMember);
-    InterlockedXor(OldProcess->ActiveProcessors, SetMember);
+    InterlockedXor(&NewProcess->ActiveProcessors, SetMember);
+    InterlockedXor(&OldProcess->ActiveProcessors, SetMember);
 #endif
 
     /* Check for new LDT */