diff --git a/MdePkg/Library/BaseLib/X64/ReadCr2.S b/MdePkg/Library/BaseLib/X64/ReadCr2.S
index e286cdcab4..e50a5a57b1 100644
--- a/MdePkg/Library/BaseLib/X64/ReadCr2.S
+++ b/MdePkg/Library/BaseLib/X64/ReadCr2.S
@@ -29,7 +29,7 @@
 #   VOID
 #   );
 #------------------------------------------------------------------------------
-.global ASM_PFX(AsmReadCr2
+.global ASM_PFX(AsmReadCr2)
 .align 16
 ASM_PFX(AsmReadCr2):
     mov     %cr2, %rax
diff --git a/MdePkg/Library/BaseLib/X64/ReadMm0.S b/MdePkg/Library/BaseLib/X64/ReadMm0.S
index 8af42c7276..b14b061419 100644
--- a/MdePkg/Library/BaseLib/X64/ReadMm0.S
+++ b/MdePkg/Library/BaseLib/X64/ReadMm0.S
@@ -31,7 +31,7 @@
 #------------------------------------------------------------------------------
 .global ASM_PFX(AsmReadMm0)
 .align 16
-ASM_PFX(AsmReadMm0:
+ASM_PFX(AsmReadMm0):
     #DB      48h, 0fh, 7eh, 0c0h
     movd 	%mm0, %rax
     ret