diff --git a/drivers/serial/serial_dma.c b/drivers/serial/serial_dma.c
index b3915c0121..87010543f9 100644
--- a/drivers/serial/serial_dma.c
+++ b/drivers/serial/serial_dma.c
@@ -42,6 +42,7 @@
 #include <sys/types.h>
 #include <stdint.h>
 #include <debug.h>
+#include <signal.h>
 
 #include <nuttx/serial/serial.h>