diff --git a/reactos/ntoskrnl/kd/kdio.c b/reactos/ntoskrnl/kd/kdio.c
index 7a644ecdc4d..db48c31e227 100644
--- a/reactos/ntoskrnl/kd/kdio.c
+++ b/reactos/ntoskrnl/kd/kdio.c
@@ -68,7 +68,7 @@ KdpLoggerThread(PVOID Context)
                         KdpDebugBuffer, end, NULL, NULL);
         }
 
-        InterlockedExchangeAddUL(&KdpFreeBytes, num);
+        (VOID)InterlockedExchangeAddUL(&KdpFreeBytes, num);
     }
 }