diff --git a/vowpalwabbit/config/include/vw/config/option.h b/vowpalwabbit/config/include/vw/config/option.h
index fa584b15..97d7d92f 100644
--- a/vowpalwabbit/config/include/vw/config/option.h
+++ b/vowpalwabbit/config/include/vw/config/option.h
@@ -7,6 +7,7 @@
 #include "vw/common/vw_exception.h"
 #include "vw/common/vw_throw.h"
 
+#include <cstdint>
 #include <memory>
 #include <set>
 #include <sstream>
diff --git a/vowpalwabbit/core/include/vw/core/feature_group.h b/vowpalwabbit/core/include/vw/core/feature_group.h
index 569c54ca..6e390565 100644
--- a/vowpalwabbit/core/include/vw/core/feature_group.h
+++ b/vowpalwabbit/core/include/vw/core/feature_group.h
@@ -10,6 +10,7 @@
 
 #include <algorithm>
 #include <cstddef>
+#include <cstdint>
 #include <iterator>
 #include <memory>
 #include <numeric>
diff --git a/vowpalwabbit/io/include/vw/io/io_adapter.h b/vowpalwabbit/io/include/vw/io/io_adapter.h
index f5131085..9c57a449 100644
--- a/vowpalwabbit/io/include/vw/io/io_adapter.h
+++ b/vowpalwabbit/io/include/vw/io/io_adapter.h
@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <functional>
 #include <memory>
 #include <string>