diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 8254dfea20..8e6b9a1dd5 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -2941,8 +2941,8 @@ void cmLocalGenerator::CopyPchCompilePdb(
     cmStrCat(target->GetLocalGenerator()->GetCurrentBinaryDirectory(), '/',
              target->GetName(), ".dir/");
 
-  std::string const copy_script = cmStrCat(
-    target_compile_pdb_dir, "copy_idb_pdb_", config.c_str(), ".cmake");
+  std::string const copy_script =
+    cmStrCat(target_compile_pdb_dir, "copy_idb_pdb_", config, ".cmake");
   cmGeneratedFileStream file(copy_script);
 
   file << "# CMake generated file\n";