diff --git a/EdkModulePkg/Universal/Variable/RuntimeDxe/Variable.c b/EdkModulePkg/Universal/Variable/RuntimeDxe/Variable.c
index cd38536836..589217a992 100644
--- a/EdkModulePkg/Universal/Variable/RuntimeDxe/Variable.c
+++ b/EdkModulePkg/Universal/Variable/RuntimeDxe/Variable.c
@@ -59,39 +59,6 @@ ReleaseLockOnlyAtBootTime (
   }
 }
 
-/**
-  A temparaty function that returns the size of a Null-terminated Unicode
-  string in bytes, including the Null terminator.
-
-  This function returns the size, in bytes, of the Null-terminated Unicode
-  string specified by String. It duplicates the functionality of StrSize()
-  in MDE library, but avoids using PCD, because IPF currently cannot convert
-  address of global variable for runtime.
-
-  If String is NULL, then ASSERT().
-  If String is not aligned on a 16-bit boundary, then ASSERT().
-
-  @param  String  Pointer to a Null-terminated Unicode string.
-
-  @return The size of String.
-
-**/
-STATIC
-UINTN
-StrSizeOfVariableName (
-  IN      CONST CHAR16              *String
-  )
-{
-  UINTN                             Length;
-
-  ASSERT (String != NULL);
-  ASSERT (((UINTN) String & 0x01) == 0);
-
-  for (Length = 0; *String != L'\0'; String++, Length++);
-
-  return (Length + 1) * sizeof (*String);
-}
-
 STATIC
 BOOLEAN
 EFIAPI
@@ -868,7 +835,7 @@ Returns:
     //
     Status = EFI_WRITE_PROTECTED;
     goto Done;
-  } else if (sizeof (VARIABLE_HEADER) + StrSizeOfVariableName (VariableName) + DataSize > MAX_VARIABLE_SIZE) {
+  } else if (sizeof (VARIABLE_HEADER) + StrSize (VariableName) + DataSize > MAX_VARIABLE_SIZE) {
     //
     //  The size of the VariableName, including the Unicode Null in bytes plus
     //  the DataSize is limited to maximum size of MAX_VARIABLE_SIZE (1024) bytes.
@@ -977,7 +944,7 @@ Returns:
     //
     NextVariable->Reserved  = 0;
     VarNameOffset           = sizeof (VARIABLE_HEADER);
-    VarNameSize             = StrSizeOfVariableName (VariableName);
+    VarNameSize             = StrSize (VariableName);
     CopyMem (
       (UINT8 *) ((UINTN) NextVariable + VarNameOffset),
       VariableName,