diff --git a/testing/drivers/drivertest/drivertest_touchpanel.c b/testing/drivers/drivertest/drivertest_touchpanel.c
index 3892c3d0f..7da74a168 100644
--- a/testing/drivers/drivertest/drivertest_touchpanel.c
+++ b/testing/drivers/drivertest/drivertest_touchpanel.c
@@ -37,6 +37,7 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <malloc.h>
 #include <string.h>
 #include <fcntl.h>