diff -r aad134c6c9c5 -r 22bb02339808 src/lemon/fib_heap.h
--- a/src/lemon/fib_heap.h	Fri Mar 04 15:24:07 2005 +0000
+++ b/src/lemon/fib_heap.h	Fri Mar 04 17:08:55 2005 +0000
@@ -88,7 +88,8 @@
       POST_HEAP = -2
     };
     
-    FibHeap(ItemIntMap &_iimap) : minimum(0), iimap(_iimap), num_items() {} 
+    explicit FibHeap(ItemIntMap &_iimap) 
+      : minimum(0), iimap(_iimap), num_items() {} 
     FibHeap(ItemIntMap &_iimap, const Compare &_comp) : minimum(0), 
       iimap(_iimap), comp(_comp), num_items() {}