diff --git a/src/device.c b/src/device.c
index 2bdc461d..0acb7cef 100644
--- a/src/device.c
+++ b/src/device.c
@@ -503,7 +503,7 @@ bool device_remove_state_watch(struct device *device, uint32_t id)
 	return watchlist_remove(&device->state_watches, id);
 }
 
-void device_enter_state(struct device *device, enum device_state state)
+static void device_enter_state(struct device *device, enum device_state state)
 {
 	struct l_dbus *dbus = dbus_get_bus();
 	bool disconnected;
diff --git a/src/device.h b/src/device.h
index c0d1b8fb..d020cbf8 100644
--- a/src/device.h
+++ b/src/device.h
@@ -61,7 +61,6 @@ uint32_t device_add_state_watch(struct device *device,
 					device_destroy_func_t destroy);
 bool device_remove_state_watch(struct device *device, uint32_t id);
 
-void device_enter_state(struct device *device, enum device_state state);
 void device_connect_network(struct device *device, struct network *network,
 				struct scan_bss *bss,
 				struct l_dbus_message *message);