diff --git a/ArmPkg/Library/UncachedMemoryAllocationLib/UncachedMemoryAllocationLib.c b/ArmPkg/Library/UncachedMemoryAllocationLib/UncachedMemoryAllocationLib.c
index cd13a7da92..0d8abad234 100644
--- a/ArmPkg/Library/UncachedMemoryAllocationLib/UncachedMemoryAllocationLib.c
+++ b/ArmPkg/Library/UncachedMemoryAllocationLib/UncachedMemoryAllocationLib.c
@@ -545,7 +545,7 @@ UncachedInternalAllocatePool (
   IN UINTN            AllocationSize
   )
 {
-  UINTN CacheLineLength = ArmDataCacheLineLength ();
+  UINTN CacheLineLength = ArmCacheWritebackGranule ();
   return UncachedInternalAllocateAlignedPool (MemoryType, AllocationSize, CacheLineLength);
 }