--- libgeos/geos/src/operation/buffer/OffsetCurveSetBuilder_old.cpp	2014-07-19 14:42:30.000000000 -0600
+++ libgeos/geos/src/operation/buffer/OffsetCurveSetBuilder.cpp	2014-07-19 14:43:24.000000000 -0600
@@ -42,6 +42,7 @@
 #include <memory>
 #include <vector>
 #include <typeinfo>
+#include <algorithm>
 
 #ifndef GEOS_DEBUG
 #define GEOS_DEBUG 0