diff --git a/topic_tools/CMakeLists.txt b/topic_tools/CMakeLists.txt
index 8ad5524..75407fe 100644
--- a/topic_tools/CMakeLists.txt
+++ b/topic_tools/CMakeLists.txt
@@ -195,6 +195,6 @@ install(DIRECTORY launch
 )
 
 install(TARGETS relay throttle drop mux demux delay
- DESTINATION lib/${PROJECT_NAME})
+  DESTINATION lib/${PROJECT_NAME})
 
 ament_package()