diff --git a/light/trace_embree.cc b/light/trace_embree.cc
index f9bf52c4..6723b44d 100644
--- a/light/trace_embree.cc
+++ b/light/trace_embree.cc
@@ -27,6 +27,7 @@
 #include <embree3/rtcore_ray.h>
 #include <vector>
 #include <cassert>
+#include <cstdint>
 #include <cstdlib>
 #include <limits>