diff -r f56582df55f4 accelerators/bvhaccel.cpp
--- a/accelerators/bvhaccel.cpp	Sun Jul 23 13:46:05 2017 +0200
+++ b/accelerators/bvhaccel.cpp	Wed Oct 31 15:07:44 2018 +0100
@@ -146,7 +146,7 @@
 
 			vector<boost::shared_ptr<BVHAccelTreeNode> >::iterator it =
 				partition(list.begin()+splits[j], list.begin()+splits[j+1], bind2nd(ptr_fun(bvh_ltf[splitAxis]), splitValue));
-			u_int middle = distance(list.begin(), it);
+			u_int middle = std::distance(list.begin(), it);
 			middle = max(splits[j]+1, min(splits[j+1]-1, middle)); // Make sure coincidental BBs are still split
 			splits.insert(splits.begin()+j+1, middle);
 		}