--- tests/unit/geos_unit.cpp.old 2019-02-04 17:16:13.102348321 +0000
+++ tests/unit/geos_unit.cpp 2019-02-04 17:16:29.394366926 +0000
@@ -12,6 +12,7 @@
#include <tut/tut_reporter.hpp>
// geos
#include <geos/unload.h>
+#include <stdlib.h>
// std
#include <cstdlib>
#include <iomanip>