diff --git a/geom/aabb.ipp b/geom/aabb.ipp
index bc95f9e1..8ea80abf 100644
--- a/geom/aabb.ipp
+++ b/geom/aabb.ipp
@@ -22,6 +22,8 @@
 
 #include "sample.hpp"
 
+#include <random>
+
 
 namespace util { namespace geom {
     template <size_t S, typename T, typename G>