diff --git a/src/pfaedle/PfaedleMain.cpp b/src/pfaedle/PfaedleMain.cpp
index c4af14a..6865bd0 100644
--- a/src/pfaedle/PfaedleMain.cpp
+++ b/src/pfaedle/PfaedleMain.cpp
@@ -92,7 +92,7 @@ int main(int argc, char** argv) {
   srand(time(NULL) + rand());  // NOLINT
 
   // use utf8 locale
-  std::setlocale(LC_ALL, "en_US.utf8");
+  setlocale(LC_ALL, "en_US.utf8");
 
   T_START(total);
 
diff --git a/src/util/tests/TestMain.cpp b/src/util/tests/TestMain.cpp
index 31d7cf1..167e293 100644
--- a/src/util/tests/TestMain.cpp
+++ b/src/util/tests/TestMain.cpp
@@ -28,7 +28,7 @@ int main(int argc, char** argv) {
 	UNUSED(argc);
 	UNUSED(argv);
 
-  std::setlocale(LC_ALL, "en_US.utf8");
+  setlocale(LC_ALL, "en_US.utf8");
 
   QuadTreeTest quadTreeTest;
   quadTreeTest.run();