diff --git a/src/clean-core/allocators/stack_allocator.hh b/src/clean-core/allocators/stack_allocator.hh
index 54a6a15..15aff8c 100644
--- a/src/clean-core/allocators/stack_allocator.hh
+++ b/src/clean-core/allocators/stack_allocator.hh
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <cstdint>
+
 #include <clean-core/allocator.hh>
 
 namespace cc
@@ -35,6 +37,6 @@ private:
     std::byte* _buffer_begin = nullptr;
     std::byte* _head = nullptr;
     std::byte* _buffer_end = nullptr;
-    int32_t _last_alloc_id = 0;
+    std::int32_t _last_alloc_id = 0;
 };
-}
\ No newline at end of file
+} // namespace cc