diff --git a/src/plugins/cppcheck/cppchecktool.cpp b/src/plugins/cppcheck/cppchecktool.cpp
index 78d3c9fee07..b13b089cee0 100644
--- a/src/plugins/cppcheck/cppchecktool.cpp
+++ b/src/plugins/cppcheck/cppchecktool.cpp
@@ -165,6 +165,8 @@ QStringList CppcheckTool::additionalArguments(const CppTools::ProjectPart &part)
     case Version::CXX2a:
         result.push_back("--language=c++");
         break;
+    case Version::None:
+        break;
     }
 
     using QtVersion = CppTools::ProjectPart::QtVersion;
diff --git a/src/plugins/cpptools/cppcodemodelinspectordumper.cpp b/src/plugins/cpptools/cppcodemodelinspectordumper.cpp
index e05c6c5eb38..7179c34aada 100644
--- a/src/plugins/cpptools/cppcodemodelinspectordumper.cpp
+++ b/src/plugins/cpptools/cppcodemodelinspectordumper.cpp
@@ -107,17 +107,18 @@ QString Utils::toString(::Utils::LanguageVersion languageVersion)
 {
 #define CASE_LANGUAGEVERSION(x) case ::Utils::LanguageVersion::x: return QLatin1String(#x)
     switch (languageVersion) {
-    CASE_LANGUAGEVERSION(C89);
-    CASE_LANGUAGEVERSION(C99);
-    CASE_LANGUAGEVERSION(C11);
-    CASE_LANGUAGEVERSION(C18);
-    CASE_LANGUAGEVERSION(CXX98);
-    CASE_LANGUAGEVERSION(CXX03);
-    CASE_LANGUAGEVERSION(CXX11);
-    CASE_LANGUAGEVERSION(CXX14);
-    CASE_LANGUAGEVERSION(CXX17);
-    CASE_LANGUAGEVERSION(CXX2a);
-    // no default to get a compiler warning if anything is added
+        CASE_LANGUAGEVERSION(None);
+        CASE_LANGUAGEVERSION(C89);
+        CASE_LANGUAGEVERSION(C99);
+        CASE_LANGUAGEVERSION(C11);
+        CASE_LANGUAGEVERSION(C18);
+        CASE_LANGUAGEVERSION(CXX98);
+        CASE_LANGUAGEVERSION(CXX03);
+        CASE_LANGUAGEVERSION(CXX11);
+        CASE_LANGUAGEVERSION(CXX14);
+        CASE_LANGUAGEVERSION(CXX17);
+        CASE_LANGUAGEVERSION(CXX2a);
+        // no default to get a compiler warning if anything is added
     }
 #undef CASE_LANGUAGEVERSION
     return QString();