diff --git a/src/adapter.c b/src/adapter.c
index 01de270..8c4d3b1 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -3495,7 +3495,7 @@ int btd_adapter_passkey_reply(struct btd_adapter *adapter,
 								passkey);
 }
 
-int btd_adapter_set_did(struct btd_adapter *adapter, uint16_t vendor,
+static int adapter_set_did(struct btd_adapter *adapter, uint16_t vendor,
 					uint16_t product, uint16_t version,
 					uint16_t source)
 {
@@ -3705,7 +3705,7 @@ struct btd_adapter *adapter_register(int id, bool powered, bool connectable,
 		default_adapter_id = id;
 
 	if (main_opts.did_source)
-		btd_adapter_set_did(adapter, main_opts.did_vendor,
+		adapter_set_did(adapter, main_opts.did_vendor,
 						main_opts.did_product,
 						main_opts.did_version,
 						main_opts.did_source);
diff --git a/src/adapter.h b/src/adapter.h
index 5c055bb..326b666 100644
--- a/src/adapter.h
+++ b/src/adapter.h
@@ -195,10 +195,6 @@ int btd_adapter_passkey_reply(struct btd_adapter *adapter,
 				const bdaddr_t *bdaddr, uint8_t bdaddr_type,
 				uint32_t passkey);
 
-int btd_adapter_set_did(struct btd_adapter *adapter, uint16_t vendor,
-					uint16_t product, uint16_t version,
-					uint16_t source);
-
 int adapter_create_bonding(struct btd_adapter *adapter, const bdaddr_t *bdaddr,
 					uint8_t addr_type, uint8_t io_cap);