diff --git a/test/re/re.traits/lookup_classname.pass.cpp b/test/re/re.traits/lookup_classname.pass.cpp
index 6819fb4f..75c08885 100644
--- a/test/re/re.traits/lookup_classname.pass.cpp
+++ b/test/re/re.traits/lookup_classname.pass.cpp
@@ -115,9 +115,9 @@ int main()
     test("xdigit", std::ctype_base::xdigit, true);
     test("Xdigit", std::ctype_base::xdigit, true);
 
-    test("dig", 0);
-    test("", 0);
-    test("digits", 0);
+    test("dig", std::ctype_base::mask());
+    test("", std::ctype_base::mask());
+    test("digits", std::ctype_base::mask());
 
     test(L"d", std::ctype_base::digit);
     test(L"D", std::ctype_base::digit);
@@ -203,7 +203,7 @@ int main()
     test(L"xdigit", std::ctype_base::xdigit, true);
     test(L"Xdigit", std::ctype_base::xdigit, true);
 
-    test(L"dig", 0);
-    test(L"", 0);
-    test(L"digits", 0);
+    test(L"dig", std::ctype_base::mask());
+    test(L"", std::ctype_base::mask());
+    test(L"digits", std::ctype_base::mask());
 }