diff -r aad134c6c9c5 -r 22bb02339808 src/lemon/bin_heap.h
--- a/src/lemon/bin_heap.h	Fri Mar 04 15:24:07 2005 +0000
+++ b/src/lemon/bin_heap.h	Fri Mar 04 17:08:55 2005 +0000
@@ -73,9 +73,10 @@
 
   public:
     ///\e
-    BinHeap(ItemIntMap &_iim) : iim(_iim) {}
+    explicit BinHeap(ItemIntMap &_iim) : iim(_iim) {}
     ///\e
-    BinHeap(ItemIntMap &_iim, const Compare &_comp) : comp(_comp), iim(_iim) {}
+    explicit BinHeap(ItemIntMap &_iim, const Compare &_comp) 
+      : iim(_iim), comp(_comp) {}
 
 
     ///\e