--- libgeos/geos/src/algorithm/LineIntersector_old.cpp	2014-07-19 14:41:39.000000000 -0600
+++ libgeos/geos/src/algorithm/LineIntersector.cpp	2014-07-19 14:41:47.000000000 -0600
@@ -32,6 +32,7 @@
 #include <string>
 #include <cmath> // for fabs()
 #include <cassert> 
+#include <algorithm>
 
 #ifndef GEOS_DEBUG
 #define GEOS_DEBUG 0