diff --git a/luna/include/luna/Alignment.h b/luna/include/luna/Alignment.h
index 02e04d92..f6f127dc 100644
--- a/luna/include/luna/Alignment.h
+++ b/luna/include/luna/Alignment.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <luna/TypeTraits.h>
+#include <luna/Types.h>
 
 // Must ALWAYS be called with a power of two as alignment.
 template <usize alignment, typename T> constexpr T is_aligned(T value)