diff --git a/CMakeLists.txt b/CMakeLists.txt
index a692ee6..034fb5e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -152,7 +152,7 @@ if(MSVC)
   # how to workaround or fix the error. So I'm disabling it globally.
   add_definitions(/wd4503)
 else()
-  add_definitions(-Wall -Wextra -Wshadow -Wnon-virtual-dtor -pedantic ${CPP11_FLAG})
+  add_definitions(-Wall -Wextra -Wshadow -Wnon-virtual-dtor -Wold-style-cast -pedantic ${CPP11_FLAG})
 
   if(APPLE)
     add_definitions(-Wno-sign-compare)
diff --git a/include/chaiscript/language/chaiscript_engine.hpp b/include/chaiscript/language/chaiscript_engine.hpp
index 523f49f..71ac325 100644
--- a/include/chaiscript/language/chaiscript_engine.hpp
+++ b/include/chaiscript/language/chaiscript_engine.hpp
@@ -464,7 +464,7 @@ namespace chaiscript
       memset( &rInfo, 0, sizeof(rInfo) ); 
       cast_union u;
       u.in_ptr = &ChaiScript::use;
-      if ( dladdr((void*)(u.out_ptr), &rInfo) && rInfo.dli_fname ) { 
+      if ( dladdr(static_cast<void*>(u.out_ptr), &rInfo) && rInfo.dli_fname ) { 
         std::string dllpath(rInfo.dli_fname);
         const size_t lastslash = dllpath.rfind('/');
         if (lastslash != std::string::npos)