diff --git a/test/limits.cc b/test/limits.cc
index b906f4f..ca7ccbc 100644
--- a/test/limits.cc
+++ b/test/limits.cc
@@ -3,6 +3,7 @@
 #include "crucible/limits.h"
 
 #include <cassert>
+#include <cstdint>
 
 using namespace crucible;