diff --git a/MdePkg/Include/Library/ArmLib.h b/MdePkg/Include/Library/ArmLib.h
index 6a1503a7e5ba..087cddfb76c3 100644
--- a/MdePkg/Include/Library/ArmLib.h
+++ b/MdePkg/Include/Library/ArmLib.h
@@ -180,24 +180,6 @@ ArmIsMpCore (
   VOID
   );
 
-VOID
-EFIAPI
-ArmInvalidateDataCache (
-  VOID
-  );
-
-VOID
-EFIAPI
-ArmCleanInvalidateDataCache (
-  VOID
-  );
-
-VOID
-EFIAPI
-ArmCleanDataCache (
-  VOID
-  );
-
 VOID
 EFIAPI
 ArmInvalidateInstructionCache (