diff --git a/reactos/ntoskrnl/mm/ARM3/drvmgmt.c b/reactos/ntoskrnl/mm/ARM3/drvmgmt.c
index ad85c479ca5..265a771eee2 100644
--- a/reactos/ntoskrnl/mm/ARM3/drvmgmt.c
+++ b/reactos/ntoskrnl/mm/ARM3/drvmgmt.c
@@ -60,7 +60,7 @@ MmLockPageableDataSection(IN PVOID AddressWithinSection)
     //
     // We should just find the section and call MmLockPageableSectionByHandle
     //
-    UNIMPLEMENTED;
+    static BOOLEAN Warn; if (!Warn++) UNIMPLEMENTED;
     return AddressWithinSection;
 }