Index: future.hpp
===================================================================
--- future.hpp	(revision 61022)
+++ future.hpp	(working copy)
@@ -424,7 +424,7 @@
                 
                 void unlock()
                 {
-                    for(unsigned i=0;i<count;++i)
+                    for(count_type i=0;i<count;++i)
                     {
                         locks[i].unlock();
                     }