diff --git a/sound_play/CMakeLists.txt b/sound_play/CMakeLists.txt
index 23be34e7..d3ba98af 100644
--- a/sound_play/CMakeLists.txt
+++ b/sound_play/CMakeLists.txt
@@ -33,7 +33,7 @@ rosidl_generate_interfaces(${PROJECT_NAME}
     builtin_interfaces
 )
 
-ament_python_install_package(${PROJECT_NAME})
+ament_python_install_package(${PROJECT_NAME} EXTEND_EXISTING)
 
 install(PROGRAMS
   scripts/is_speaking.py