diff --git a/include/fruit/impl/util/type_info.defn.h b/include/fruit/impl/util/type_info.defn.h
index d077b025..304e2907 100644
--- a/include/fruit/impl/util/type_info.defn.h
+++ b/include/fruit/impl/util/type_info.defn.h
@@ -25,6 +25,8 @@
 #include <fruit/impl/fruit-config.h>
 #include <fruit/impl/fruit_assert.h>
 
+#include <type_traits>
+
 namespace fruit {
 namespace impl {