diff --git a/std/ctime.hpp b/std/ctime.hpp
index 95aead6a47..d85233d54d 100644
--- a/std/ctime.hpp
+++ b/std/ctime.hpp
@@ -7,7 +7,6 @@
 
 #include <ctime>
 
-using std::clock;
 using std::time;
 
 #ifdef DEBUG_NEW