diff --git a/example/example.cpp b/example/example.cpp
index 1ae8d8d..f8996d4 100644
--- a/example/example.cpp
+++ b/example/example.cpp
@@ -24,7 +24,6 @@
 // Simple Example.
 
 #include <iostream>
-#include <cstdint>
 #include <nameof.hpp>
 
 struct SomeStruct {
diff --git a/src/nameof.hpp b/src/nameof.hpp
index 5bc7c6c..4c00fec 100644
--- a/src/nameof.hpp
+++ b/src/nameof.hpp
@@ -22,6 +22,7 @@
 // SOFTWARE.
 
 #pragma once
+#include <cstddef>
 
 inline constexpr const char* template_nameof_(const char* name, size_t length) {
   return length == 0 ? name