diff --git a/MdeModulePkg/Universal/EbcDxe/EbcExecute.c b/MdeModulePkg/Universal/EbcDxe/EbcExecute.c
index 4f47e206e7..788f505617 100644
--- a/MdeModulePkg/Universal/EbcDxe/EbcExecute.c
+++ b/MdeModulePkg/Universal/EbcDxe/EbcExecute.c
@@ -1370,7 +1370,7 @@ EbcExecuteInstructions (
   UINTN       InstructionsLeft;
   UINTN       SavedInstructionCount;
 
-  if ((*VmPtr->Ip & 0x3F) >= sizeof(mVmOpcodeTable)) {
+  if ((*VmPtr->Ip & 0x3F) >= sizeof(mVmOpcodeTable)/sizeof(mVmOpcodeTable[0])) {
     EbcDebugSignalException (EXCEPT_EBC_INVALID_OPCODE, EXCEPTION_FLAG_FATAL, VmPtr);
     return EFI_UNSUPPORTED;
   }