diff --git a/hash.h b/hash.h
index 808bcd7..9de69e7 100644
--- a/hash.h
+++ b/hash.h
@@ -10,7 +10,6 @@ typedef struct {
 } store_t;
 
 struct comparator
-    : public std::binary_function<const char *, const char *, bool>
 {
     bool operator()(const char * _Left, const char *_Right) const
     {