diff --git a/android/adapter.c b/android/adapter.c
index 160623a..5f90e96 100644
--- a/android/adapter.c
+++ b/android/adapter.c
@@ -201,11 +201,11 @@ static void load_link_keys_complete(uint8_t status, uint16_t length,
 	DBG("status %u", status);
 
 	default_adapter = adapter;
-	adapter->ready(adapter, 0);
+	adapter->ready(0);
 	return;
 
 failed:
-	adapter->ready(NULL, err);
+	adapter->ready(err);
 }
 
 static void load_link_keys(struct bt_adapter *adapter, GSList *keys)
@@ -274,7 +274,7 @@ static void read_info_complete(uint8_t status, uint16_t length, const void *para
 	return;
 
 failed:
-	adapter->ready(NULL, err);
+	adapter->ready(err);
 }
 
 void bt_adapter_init(uint16_t index, struct mgmt *mgmt, bt_adapter_ready cb)
diff --git a/android/adapter.h b/android/adapter.h
index 236f10a..2afc67a 100644
--- a/android/adapter.h
+++ b/android/adapter.h
@@ -28,9 +28,7 @@
 
 #include "lib/bluetooth.h"
 
-struct bt_adapter;
-
-typedef void (*bt_adapter_ready)(struct bt_adapter *adapter, int err);
+typedef void (*bt_adapter_ready)(int err);
 
 void bt_adapter_init(uint16_t index, struct mgmt *mgmt_if,
 							bt_adapter_ready cb);
diff --git a/android/main.c b/android/main.c
index 740b532..50b5901 100644
--- a/android/main.c
+++ b/android/main.c
@@ -392,7 +392,7 @@ static GOptionEntry options[] = {
 	{ NULL }
 };
 
-static void adapter_ready(struct bt_adapter *adapter, int err)
+static void adapter_ready(int err)
 {
 	if (err) {
 		error("Adapter initialization failed: %s", strerror(err));