diff --git a/master/cdev.c b/master/cdev.c
index 32138ce7..c5a4700e 100644
--- a/master/cdev.c
+++ b/master/cdev.c
@@ -169,6 +169,7 @@ int ec_cdev_ioctl_master(
     data.config_count = ec_master_config_count(master);
     data.domain_count = ec_master_domain_count(master);
     data.phase = (uint8_t) master->phase;
+    data.scan_busy = master->scan_busy;
     up(&master->master_sem);
 
     if (down_interruptible(&master->device_sem))
diff --git a/master/ioctl.h b/master/ioctl.h
index b9b9da54..5fda5af0 100644
--- a/master/ioctl.h
+++ b/master/ioctl.h
@@ -129,6 +129,7 @@ typedef struct {
     uint32_t config_count;
     uint32_t domain_count;
     uint8_t phase;
+    uint8_t scan_busy;
     struct {
         uint8_t address[6];
         uint8_t attached;