diff --git a/CMakeLists.txt b/CMakeLists.txt
index d31b15a2b..82b4daf77 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -82,6 +82,7 @@ add_subdirectory(3rdparty/lexy)
 
 list(APPEND BT_SOURCE
     src/action_node.cpp
+    src/interaction_node.cpp
     src/basic_types.cpp
     src/behavior_tree.cpp
     src/blackboard.cpp