diff --git a/ArmPkg/Library/StandaloneMmMmuLib/Aarch64/ArmMmuStandaloneMmLib.c b/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c
similarity index 100%
rename from ArmPkg/Library/StandaloneMmMmuLib/Aarch64/ArmMmuStandaloneMmLib.c
rename to ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c
diff --git a/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
index d589b23603..7219b59e6f 100644
--- a/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
+++ b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf
@@ -22,7 +22,7 @@
   PI_SPECIFICATION_VERSION       = 0x00010032
 
 [Sources.AARCH64]
-  Aarch64/ArmMmuStandaloneMmLib.c
+  AArch64/ArmMmuStandaloneMmLib.c
 
 [Packages]
   ArmPkg/ArmPkg.dec