diff --git a/src/adapter.c b/src/adapter.c
index e2d50db..01de270 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -2797,7 +2797,7 @@ static void load_config(struct btd_adapter *adapter)
 	g_key_file_free(key_file);
 }
 
-gboolean adapter_setup(struct btd_adapter *adapter, gboolean powered,
+static gboolean adapter_setup(struct btd_adapter *adapter, gboolean powered,
 					bool connectable, bool discoverable)
 {
 	struct agent *agent;
diff --git a/src/adapter.h b/src/adapter.h
index 8b7df36..5c055bb 100644
--- a/src/adapter.h
+++ b/src/adapter.h
@@ -103,8 +103,6 @@ void adapter_remove_device(struct btd_adapter *adapter,
 						struct btd_device *device,
 						gboolean remove_storage);
 
-gboolean adapter_setup(struct btd_adapter *adapter, gboolean powered,
-					bool connectable, bool discoverable);
 void adapter_set_discovering(struct btd_adapter *adapter,
 						gboolean discovering);
 uint16_t adapter_get_dev_id(struct btd_adapter *adapter);