diff --git a/drivers/spi/spi_slave_driver.c b/drivers/spi/spi_slave_driver.c
index 7971c21052..0e47e57454 100644
--- a/drivers/spi/spi_slave_driver.c
+++ b/drivers/spi/spi_slave_driver.c
@@ -30,6 +30,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
+#include <assert.h>
 #include <debug.h>
 
 #include <nuttx/kmalloc.h>