diff --git a/src/drivers/px4io/px4io.cpp b/src/drivers/px4io/px4io.cpp
index 0a979267db..cbdd5acc44 100644
--- a/src/drivers/px4io/px4io.cpp
+++ b/src/drivers/px4io/px4io.cpp
@@ -962,7 +962,7 @@ out:
 int
 PX4IO::io_set_control_groups()
 {
-	ret = io_set_control_state(0);
+	int ret = io_set_control_state(0);
 
 	/* send auxiliary control groups */
 	(void)io_set_control_state(1);