1 files changed, 3 insertions, 2 deletions
diff --git a/Source/cmGlobalGenerator.cxx b/Source/cmGlobalGenerator.cxx
index 386a3f7..50d361e 100644
--- a/Source/cmGlobalGenerator.cxx
+++ b/Source/cmGlobalGenerator.cxx
@@ -680,8 +680,9 @@ void cmGlobalGenerator::EnableLanguage(
         std::string compilerEnv = "CMAKE_";
         compilerEnv += lang;
         compilerEnv += "_COMPILER_ENV_VAR";
-        std::string envVar = mf->GetRequiredDefinition(compilerEnv);
-        std::string envVarValue = mf->GetRequiredDefinition(compilerName);
+        const std::string& envVar = mf->GetRequiredDefinition(compilerEnv);
+        const std::string& envVarValue =
+          mf->GetRequiredDefinition(compilerName);
         std::string env = envVar;
         env += "=";
         env += envVarValue;