diff --git a/include/termios.h b/include/termios.h
index 00ff32e5c66..8427cbf5991 100644
--- a/include/termios.h
+++ b/include/termios.h
@@ -110,8 +110,8 @@
 #define HUPCL     (1 << 6)  /* Bit 6: Hang up on last close */
 #define CLOCAL    (1 << 7)  /* Bit 7: Ignore modem status lines */
 #define CCTS_OFLOW (1 << 8) /* Bit 8: CTS flow control of output */
-#define CRTSCTS   CCTS_OFLOW
 #define CRTS_IFLOW (1 << 9) /* Bit 9: RTS flow control of input */
+#define CRTSCTS   (CRTS_IFLOW | CCTS_OFLOW)
 
 /* Local Modes (c_lflag in the termios structure) */