diff --git a/libwpd/src/lib/WPXTable.h b/libwpd/src/lib/WPXTable.h
index bdbaf79..f7508a0 100644
--- a/libwpd/src/lib/WPXTable.h
+++ b/libwpd/src/lib/WPXTable.h
@@ -36,6 +36,7 @@
 #ifndef _WPXTABLE_H
 #define _WPXTABLE_H
 
+#include <stddef.h>
 #include <vector>
 
 struct WPXTableCell