diff --git a/MdeModulePkg/Include/Library/HiiLib.h b/MdeModulePkg/Include/Library/HiiLib.h
index 7c561a69db..1c8a84ee21 100644
--- a/MdeModulePkg/Include/Library/HiiLib.h
+++ b/MdeModulePkg/Include/Library/HiiLib.h
@@ -476,6 +476,28 @@ HiiFreeOpCodeHandle (
   VOID  *OpCodeHandle
   );
 
+/**
+  Append raw opcodes to an OpCodeHandle.
+
+  If OpCodeHandle is NULL, then ASSERT().
+  If RawBuffer is NULL, then ASSERT();
+
+  @param[in]  OpCodeHandle   Handle to the buffer of opcodes.
+  @param[in]  RawBuffer      Buffer of opcodes to append.
+  @param[in]  RawBufferSize  The size, in bytes, of Buffer.
+
+  @retval NULL   There is not enough space left in Buffer to add the opcode.
+  @retval Other  A pointer to the appended opcodes.
+
+**/
+UINT8 *
+EFIAPI
+HiiCreateRawOpCodes (
+  IN VOID   *OpCodeHandle,
+  IN UINT8  *RawBuffer,
+  IN UINTN  RawBufferSize
+  );
+
 /**
   Create EFI_IFR_END_OP opcode.
 
diff --git a/MdeModulePkg/Library/UefiHiiLib/HiiLib.c b/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
index 3f3b1aac6b..5827f83693 100644
--- a/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
+++ b/MdeModulePkg/Library/UefiHiiLib/HiiLib.c
@@ -1446,7 +1446,7 @@ InternalHiiCreateOpCode (
 **/
 UINT8 *
 EFIAPI
-InternalHiiCreateRawOpCodes (
+HiiCreateRawOpCodes (
   IN VOID   *OpCodeHandle,
   IN UINT8  *RawBuffer,
   IN UINTN  RawBufferSize
@@ -1485,7 +1485,7 @@ InternalHiiAppendOpCodes (
   ASSERT (RawOpCodeHandle != NULL);
 
   RawOpCodeBuffer = (HII_LIB_OPCODE_BUFFER *)RawOpCodeHandle;
-  return InternalHiiCreateRawOpCodes (OpCodeHandle, RawOpCodeBuffer->Buffer, RawOpCodeBuffer->Position);
+  return HiiCreateRawOpCodes (OpCodeHandle, RawOpCodeBuffer->Buffer, RawOpCodeBuffer->Position);
 }
 
 /**