diff --git a/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c b/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c
index b737db1c3c..ea77bead6f 100644
--- a/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c
+++ b/MdeModulePkg/Universal/EbcDxe/X64/EbcSupport.c
@@ -559,11 +559,11 @@ EbcLLCALLEX (
     IsThunk = 0;
     goto Action;
   }
-  if (*((UINT8 *)FuncAddr + 10) != 0x48)  {
+  if (*((UINT8 *)FuncAddr + 10) != 0x49)  {
     IsThunk = 0;
     goto Action;
   }
-  if (*((UINT8 *)FuncAddr + 11) != 0xB8)  {
+  if (*((UINT8 *)FuncAddr + 11) != 0xBA)  {
     IsThunk = 0;
     goto Action;
   }