diff --git a/dlls/advapi32/registry.c b/dlls/advapi32/registry.c
index 328ae39a3e4..97561e2559e 100644
--- a/dlls/advapi32/registry.c
+++ b/dlls/advapi32/registry.c
@@ -3280,40 +3280,12 @@ cleanup:
 /******************************************************************************
  * RegLoadMUIStringA [ADVAPI32.@]
  *
- * See RegLoadMUIStringW
+ * Not implemented on native.
  */
 LSTATUS WINAPI RegLoadMUIStringA(HKEY hKey, LPCSTR pszValue, LPSTR pszBuffer, DWORD cbBuffer,
     LPDWORD pcbData, DWORD dwFlags, LPCSTR pszBaseDir)
 {
-    UNICODE_STRING valueW, baseDirW;
-    WCHAR *pwszBuffer;
-    DWORD cbData = cbBuffer * sizeof(WCHAR);
-    LONG result;
-
-    valueW.Buffer = baseDirW.Buffer = pwszBuffer = NULL;
-    if (!RtlCreateUnicodeStringFromAsciiz(&valueW, pszValue) ||
-        !RtlCreateUnicodeStringFromAsciiz(&baseDirW, pszBaseDir) ||
-        !(pwszBuffer = heap_alloc(cbData)))
-    {
-        result = ERROR_NOT_ENOUGH_MEMORY;
-        goto cleanup;
-    }
-
-    result = RegLoadMUIStringW(hKey, valueW.Buffer, pwszBuffer, cbData, NULL, dwFlags, 
-                               baseDirW.Buffer);
- 
-    if (result == ERROR_SUCCESS) {
-        cbData = WideCharToMultiByte(CP_ACP, 0, pwszBuffer, -1, pszBuffer, cbBuffer, NULL, NULL);
-        if (pcbData)
-            *pcbData = cbData;
-    }
-
-cleanup:
-    heap_free(pwszBuffer);
-    RtlFreeUnicodeString(&baseDirW);
-    RtlFreeUnicodeString(&valueW);
- 
-    return result;
+    return ERROR_CALL_NOT_IMPLEMENTED;
 }
 
 /******************************************************************************
diff --git a/dlls/advapi32/tests/registry.c b/dlls/advapi32/tests/registry.c
index cadb936f2ae..a1fcb5e3e7a 100644
--- a/dlls/advapi32/tests/registry.c
+++ b/dlls/advapi32/tests/registry.c
@@ -3917,7 +3917,7 @@ static void test_RegLoadMUIString(void)
        wine_dbgstr_wn(bufW, size / sizeof(WCHAR)), wine_dbgstr_wn(textW, text_size / sizeof(WCHAR)));
 
     ret = pRegLoadMUIStringA(hkey, tz_value, buf, ARRAY_SIZE(buf), &size, 0, NULL);
-    todo_wine ok(ret == ERROR_CALL_NOT_IMPLEMENTED, "got %d, expected ERROR_CALL_NOT_IMPLEMENTED\n", ret);
+    ok(ret == ERROR_CALL_NOT_IMPLEMENTED, "got %d, expected ERROR_CALL_NOT_IMPLEMENTED\n", ret);
 
     /* change the current direcoty to other than system32 directory */
     SetCurrentDirectoryA("\\");
@@ -3932,13 +3932,13 @@ static void test_RegLoadMUIString(void)
        wine_dbgstr_wn(bufW, size / sizeof(WCHAR)), wine_dbgstr_wn(textW, text_size / sizeof(WCHAR)));
 
     ret = pRegLoadMUIStringA(hkey, tz_value, buf, ARRAY_SIZE(buf), &size, 0, sysdir);
-    todo_wine ok(ret == ERROR_CALL_NOT_IMPLEMENTED, "got %d, expected ERROR_CALL_NOT_IMPLEMENTED\n", ret);
+    ok(ret == ERROR_CALL_NOT_IMPLEMENTED, "got %d, expected ERROR_CALL_NOT_IMPLEMENTED\n", ret);
 
     ret = pRegLoadMUIStringW(hkey, tz_valueW, bufW, ARRAY_SIZE(bufW), &size, 0, NULL);
     ok(ret == ERROR_FILE_NOT_FOUND, "got %d, expected ERROR_FILE_NOT_FOUND\n", ret);
 
     ret = pRegLoadMUIStringA(hkey, tz_value, buf, ARRAY_SIZE(buf), &size, 0, NULL);
-    todo_wine ok(ret == ERROR_CALL_NOT_IMPLEMENTED, "got %d, expected ERROR_CALL_NOT_IMPLEMENTED\n", ret);
+    ok(ret == ERROR_CALL_NOT_IMPLEMENTED, "got %d, expected ERROR_CALL_NOT_IMPLEMENTED\n", ret);
 
     RegCloseKey(hkey);
     SetCurrentDirectoryW(curdirW);