1 files changed, 3 insertions, 7 deletions
diff --git a/Source/cmNinjaNormalTargetGenerator.cxx b/Source/cmNinjaNormalTargetGenerator.cxx
index 1c5bac8..4f6da0e 100644
--- a/Source/cmNinjaNormalTargetGenerator.cxx
+++ b/Source/cmNinjaNormalTargetGenerator.cxx
@@ -126,15 +126,11 @@ void cmNinjaNormalTargetGenerator::WriteLanguagesRules(
   std::set<std::string> languages;
   std::vector<cmSourceFile const*> sourceFiles;
   this->GetGeneratorTarget()->GetObjectSources(sourceFiles, config);
-  for (cmSourceFile const* sf : sourceFiles) {
-    std::string const lang = sf->GetLanguage();
-    if (!lang.empty()) {
-      languages.insert(lang);
+  if (this->HaveRequiredLanguages(sourceFiles, languages)) {
+    for (std::string const& language : languages) {
+      this->WriteLanguageRules(language, config);
     }
   }
-  for (std::string const& language : languages) {
-    this->WriteLanguageRules(language, config);
-  }
 }
 
 const char* cmNinjaNormalTargetGenerator::GetVisibleTypeName() const