diff --git a/ipc/ipc_send_fds_test.cc b/ipc/ipc_send_fds_test.cc
index a3b4d4e8..81f5894 100644
--- a/ipc/ipc_send_fds_test.cc
+++ b/ipc/ipc_send_fds_test.cc
@@ -11,6 +11,7 @@
 }
 #endif
 #include <fcntl.h>
+#include <stddef.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
 #include <unistd.h>