diff --git a/include/scenefx/types/fx/clipped_region.h b/include/scenefx/types/fx/clipped_region.h
index aaa9b1d3..648d266c 100644
--- a/include/scenefx/types/fx/clipped_region.h
+++ b/include/scenefx/types/fx/clipped_region.h
@@ -1,6 +1,7 @@
 #ifndef SCENEFX_TYPES_FX_CLIPPED_REGION_H
 #define SCENEFX_TYPES_FX_CLIPPED_REGION_H
 
+#include <linux/stddef.h>
 #include <wlr/util/box.h>
 
 // uint16_t is a reasonable enough range for corner radius