diff --git a/src/drivers/boards/px4fmu-v4/px4fmu_init.c b/src/drivers/boards/px4fmu-v4/px4fmu_init.c
index f408ab74cc..0cd1007bd5 100644
--- a/src/drivers/boards/px4fmu-v4/px4fmu_init.c
+++ b/src/drivers/boards/px4fmu-v4/px4fmu_init.c
@@ -179,7 +179,7 @@ __EXPORT void board_on_reset(int status)
 	 */
 
 	if (status >= 0) {
-		up_mdelay(6);
+		up_mdelay(400);
 	}
 }