diff --git a/scripts/generators/safe_struct_generator.py b/scripts/generators/safe_struct_generator.py
index 282115e..72e2281 100644
--- a/scripts/generators/safe_struct_generator.py
+++ b/scripts/generators/safe_struct_generator.py
@@ -400,6 +400,7 @@ void FreePnextChain(const void *pNext) {
             #include <vulkan/utility/vk_safe_struct.hpp>
             #include <vulkan/utility/vk_struct_helper.hpp>
 
+            #include <cstddef>
             #include <cstring>
 
             namespace vku {