diff --git a/dtool/src/dtoolutil/executionEnvironment.cxx b/dtool/src/dtoolutil/executionEnvironment.cxx
index eda3dc58fa..e7b4d769ad 100644
--- a/dtool/src/dtoolutil/executionEnvironment.cxx
+++ b/dtool/src/dtoolutil/executionEnvironment.cxx
@@ -449,7 +449,7 @@ ns_set_environment_variable(const string &var, const string &value) {
 void ExecutionEnvironment::
 ns_shadow_environment_variable(const string &var, const string &value) {
   _variables[var] = value;
-  string putstr = var + "=" + value;
+  //string putstr = var + "=" + value;
 }
 
 /**