diff --git a/include/boost/pending/indirect_cmp.hpp b/include/boost/pending/indirect_cmp.hpp
index 5e866561..638625ce 100644
--- a/include/boost/pending/indirect_cmp.hpp
+++ b/include/boost/pending/indirect_cmp.hpp
@@ -65,7 +65,7 @@ namespace boost {
     inline indirect_pmap(const ReadablePropertyMap& df)
       : d(df) { }
 
-    inline bool operator()(const K& u) const {
+    inline T operator()(const K& u) const {
       return get(d, u);
     }
   protected: