diff --git a/arch/arm/src/am335x/am335x_serial.c b/arch/arm/src/am335x/am335x_serial.c
index ce3eb3f2320..a16c296deef 100644
--- a/arch/arm/src/am335x/am335x_serial.c
+++ b/arch/arm/src/am335x/am335x_serial.c
@@ -53,6 +53,7 @@
 
 #include <nuttx/irq.h>
 #include <nuttx/arch.h>
+#include <nuttx/fs/ioctl.h>
 #include <nuttx/serial/serial.h>
 
 #include <arch/board/board.h>