diff --git a/include/SFML/Window/Vulkan.hpp b/include/SFML/Window/Vulkan.hpp
index 8c057aaa..21018da5 100644
--- a/include/SFML/Window/Vulkan.hpp
+++ b/include/SFML/Window/Vulkan.hpp
@@ -31,6 +31,7 @@
 #include <SFML/Window/Export.hpp>
 #include <SFML/Window/WindowHandle.hpp>
 #include <vector>
+#include <cstddef>
 #include <stdint.h>