diff --git a/util/qlalr/compress.cpp b/util/qlalr/compress.cpp
index 626ca53..586258f 100644
--- a/util/qlalr/compress.cpp
+++ b/util/qlalr/compress.cpp
@@ -46,11 +46,14 @@
 #include <algorithm>
 #include <iterator>
 #include <iostream>
+#include <functional>
 #include "compress.h"

 #define QLALR_NO_CHECK_SORTED_TABLE

-struct _Fit: public std::binary_function<int, int, bool>
+using namespace std;
+
+struct _Fit: public binary_function<int, int, bool>
 {
   inline bool operator () (int a, int b) const
   {
@@ -58,7 +61,7 @@ struct _Fit: public std::binary_function<int, int, bool>
   }
 };

-struct _PerfectMatch: public std::binary_function<int, int, bool>
+struct _PerfectMatch: public binary_function<int, int, bool>
 {
   inline bool operator () (int a, int b) const
   { return a == b; }
@@ -148,7 +151,7 @@ private:
   const_iterator _M_endNonZeros;
 };

-struct _SortUncompressedRow: public std::binary_function<UncompressedRow, UncompressedRow, bool>
+struct _SortUncompressedRow: public binary_function<UncompressedRow, UncompressedRow, bool>
 {
   inline bool operator () (const UncompressedRow &a, const UncompressedRow &b) const
   { return a.count (0) > b.count (0); }