diff --git a/performance_tests/profile_cpp_calls_2.cpp b/performance_tests/profile_cpp_calls_2.cpp
index 0424654b..aa87fc03 100644
--- a/performance_tests/profile_cpp_calls_2.cpp
+++ b/performance_tests/profile_cpp_calls_2.cpp
@@ -7,7 +7,7 @@ double f(const std::string &, double, bool) noexcept {
 
 int main()
 {
-  chaiscript::ChaiScript chai(chaiscript::Std_Lib::library());
+  chaiscript::ChaiScript chai;
 
   chai.add(chaiscript::fun(&f), "f");
 
diff --git a/performance_tests/profile_fun_wrappers.cpp b/performance_tests/profile_fun_wrappers.cpp
index fb96f483..119f6929 100644
--- a/performance_tests/profile_fun_wrappers.cpp
+++ b/performance_tests/profile_fun_wrappers.cpp
@@ -7,7 +7,7 @@ double f(const std::string &, double, bool) noexcept {
 
 int main()
 {
-  chaiscript::ChaiScript chai(chaiscript::Std_Lib::library());
+  chaiscript::ChaiScript chai;
 
   chai.add(chaiscript::fun(&f), "f");