diff --git a/reactos/ntoskrnl/dbgk/debug.c b/reactos/ntoskrnl/dbgk/debug.c
index 14253e710e8..a51373431b7 100644
--- a/reactos/ntoskrnl/dbgk/debug.c
+++ b/reactos/ntoskrnl/dbgk/debug.c
@@ -1294,7 +1294,7 @@ ThreadScan:
                 if (DebugEvent->Flags & 0x10)
                 {
                     /* Set busy flag */
-                    InterlockedOr(&DebugEvent->Flags, 0x100);
+                    InterlockedOr((PLONG)&DebugEvent->Flags, 0x100);
                 }
                 else
                 {
@@ -1313,7 +1313,7 @@ ThreadScan:
                     DebugEvent->BackoutThread = NULL;
 
                     /* Set flag */
-                    InterlockedOr(&DebugEvent->Flags, 0x80);
+                    InterlockedOr((PLONG)&DebugEvent->Flags, 0x80);
                 }
             }
             else