diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index 984269d07e8..193fa5bbb4d 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -2890,7 +2890,7 @@ static const Token* skipConstVolatileBackwards(const Token* tok) {
 
 bool Tokenizer::simplifyUsing()
 {
-    if (!isCPP() || mSettings.standards.cpp < Standards::CPP11)
+    if (!isCPP())
         return false;
 
     // simplify using N::x; to using x = N::x;
diff --git a/test/testsimplifyusing.cpp b/test/testsimplifyusing.cpp
index 8eba2142913..58af4c972bc 100644
--- a/test/testsimplifyusing.cpp
+++ b/test/testsimplifyusing.cpp
@@ -75,6 +75,7 @@ class TestSimplifyUsing : public TestFixture {
         TEST_CASE(simplifyUsing36);
         TEST_CASE(simplifyUsing37);
         TEST_CASE(simplifyUsing38);
+        TEST_CASE(simplifyUsing39);
 
         TEST_CASE(simplifyUsing8970);
         TEST_CASE(simplifyUsing8971);
@@ -106,12 +107,14 @@ class TestSimplifyUsing : public TestFixture {
         Platform::Type type = Platform::Type::Native;
         bool debugwarnings = true;
         bool preprocess = false;
+        Standards::cppstd_t cppstd = Standards::CPPLatest;
     };
 
 #define tok(...) tok_(__FILE__, __LINE__, __VA_ARGS__)
     template<size_t size>
     std::string tok_(const char* file, int line, const char (&code)[size], const TokOptions& options = make_default_obj()) {
-        const Settings settings = settingsBuilder(settings0).certainty(Certainty::inconclusive).debugwarnings(options.debugwarnings).platform(options.type).build();
+        const Settings settings = settingsBuilder(settings0).certainty(Certainty::inconclusive).debugwarnings(options.debugwarnings)
+                                  .platform(options.type).cpp(options.cppstd).build();
 
         if (options.preprocess) {
             SimpleTokenizer2 tokenizer(settings, *this, code, "test.cpp");
@@ -925,6 +928,16 @@ class TestSimplifyUsing : public TestFixture {
         ASSERT_EQUALS("", errout_str());
     }
 
+    void simplifyUsing39() {
+        const char code[] = "using std::wstring;\n" // #14578
+                            "std::wstring ws;";
+        const char expected[] = "std :: wstring ws ;";
+        ASSERT_EQUALS(expected, tok(code));
+        ASSERT_EQUALS("", errout_str());
+        ASSERT_EQUALS(expected, tok(code, dinit(TokOptions, $.cppstd = Standards::CPP03)));
+        ASSERT_EQUALS("", errout_str());
+    }
+
     void simplifyUsing8970() {
         const char code[] = "using V = std::vector<int>;\n"
                             "struct A {\n"