diff --git a/src/zm_rtp_ctrl.h b/src/zm_rtp_ctrl.h
index 896b125a1..9346496f7 100644
--- a/src/zm_rtp_ctrl.h
+++ b/src/zm_rtp_ctrl.h
@@ -21,6 +21,7 @@
 #define ZM_RTP_CTRL_H
 
 #include <atomic>
+#include <sys/types.h>
 #include <thread>
 
 // Defined in ffmpeg rtp.h