diff --git a/src/uvw/emitter.h b/src/uvw/emitter.h
index 0db49b60..2585861d 100644
--- a/src/uvw/emitter.h
+++ b/src/uvw/emitter.h
@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <cstddef>
+#include <cstdint>
 #include <functional>
 #include <list>
 #include <memory>
diff --git a/src/uvw/thread.h b/src/uvw/thread.h
index 6f1c8223..c97ac799 100644
--- a/src/uvw/thread.h
+++ b/src/uvw/thread.h
@@ -2,6 +2,7 @@
 #define UVW_THREAD_INCLUDE_H
 
 #include <cstddef>
+#include <cstdint>
 #include <memory>
 #include <string>
 #include <type_traits>
diff --git a/src/uvw/timer.h b/src/uvw/timer.h
index 0e33446d..5aa89162 100644
--- a/src/uvw/timer.h
+++ b/src/uvw/timer.h
@@ -1,6 +1,7 @@
 #ifndef UVW_TIMER_INCLUDE_H
 #define UVW_TIMER_INCLUDE_H
 
+#include <cstdint>
 #include <chrono>
 #include <uv.h>
 #include "handle.hpp"
diff --git a/src/uvw/type_info.hpp b/src/uvw/type_info.hpp
index 4acee3a3..479e9972 100644
--- a/src/uvw/type_info.hpp
+++ b/src/uvw/type_info.hpp
@@ -2,6 +2,7 @@
 #define UVW_TYPE_INFO_INCLUDE_HPP
 
 #include <cstddef>
+#include <cstdint>
 #include <string_view>
 
 namespace uvw {
diff --git a/src/uvw/util.h b/src/uvw/util.h
index 72326c2c..fd94d3a3 100644
--- a/src/uvw/util.h
+++ b/src/uvw/util.h
@@ -3,6 +3,7 @@
 
 #include <array>
 #include <cstddef>
+#include <cstdint>
 #include <memory>
 #include <string>
 #include <string_view>