diff --git a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c
index 1d3ea61311..9b5adeaf89 100644
--- a/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c
+++ b/ArmPkg/Library/DefaultExceptionHandlerLib/AArch64/DefaultExceptionHandler.c
@@ -128,7 +128,7 @@ DescribeInstructionOrDataAbort (
 STATIC
 VOID
 DescribeExceptionSyndrome (
-  IN UINT32  Esr
+  IN UINT64  Esr
   )
 {
   CHAR8  *Message;