diff --git a/test/cpp/src/nb-main.cpp b/test/cpp/src/nb-main.cpp
index 6887e4e..7650d49 100644
--- a/test/cpp/src/nb-main.cpp
+++ b/test/cpp/src/nb-main.cpp
@@ -42,11 +42,7 @@
 #include <set>
 #include <stdexcept>
 #include <sstream>
-
 #include <map>
-#include <ext/hash_map>
-using __gnu_cxx::hash_map;
-using __gnu_cxx::hash;
 
 using namespace std;
 using namespace boost;
@@ -320,7 +316,7 @@
       workerCount = atoi(args["workers"].c_str());
     }
 
-  } catch(exception& e) {
+  } catch(std::exception& e) {
     cerr << e.what() << endl;
     cerr << usage;
   }