diff --git a/MdePkg/Include/IndustryStandard/Sal.h b/MdePkg/Include/IndustryStandard/Sal.h
index 2199efe14c..7b111e02c3 100644
--- a/MdePkg/Include/IndustryStandard/Sal.h
+++ b/MdePkg/Include/IndustryStandard/Sal.h
@@ -19,7 +19,7 @@
 ///
 /// SAL return status type 
 ///
-typedef UINTN EFI_SAL_STATUS;
+typedef INTN EFI_SAL_STATUS;
 
 ///
 /// Call completed without error.