diff --git a/examples/bluetooth/bluedroid/classic_bt/hfp_ag/CMakeLists.txt b/examples/bluetooth/bluedroid/classic_bt/hfp_ag/CMakeLists.txt
index ab8aa0ac1..f724b1556 100644
--- a/examples/bluetooth/bluedroid/classic_bt/hfp_ag/CMakeLists.txt
+++ b/examples/bluetooth/bluedroid/classic_bt/hfp_ag/CMakeLists.txt
@@ -2,5 +2,6 @@
 # CMakeLists in this exact order for cmake to work correctly
 cmake_minimum_required(VERSION 3.5)
 
+set(SUPPORTED_TARGETS esp32)
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(hfp_ag)