diff --git a/include/json/config.h b/include/json/config.h
index cbb5950e2..4a5a3de4b 100644
--- a/include/json/config.h
+++ b/include/json/config.h
@@ -12,7 +12,6 @@
 #include <ostream>
 #include <sstream>
 #include <string>
-#include <type_traits>
 
 /// If defined, indicates that json library is embedded in CppTL library.
 //# define JSON_IN_CPPTL 1