diff --git a/io/include/pcl/io/low_level_io.h b/io/include/pcl/io/low_level_io.h
index 18cdcebe548..7fabd4f1128 100644
--- a/io/include/pcl/io/low_level_io.h
+++ b/io/include/pcl/io/low_level_io.h
@@ -61,6 +61,7 @@ using ssize_t = SSIZE_T;
 # include <sys/fcntl.h>
 # include <cerrno>
 #endif
+#include <cstddef>
 
 namespace pcl
 {