diff --git a/source/mijin/util/bitarray.hpp b/source/mijin/util/bitarray.hpp
index f4a6f62..223a78b 100644
--- a/source/mijin/util/bitarray.hpp
+++ b/source/mijin/util/bitarray.hpp
@@ -8,6 +8,8 @@
 #include <atomic>
 #include <cstddef>
 
+#include "../debug/assert.hpp"
+
 namespace mijin
 {