diff --git a/CMakeLists.txt b/CMakeLists.txt
index ad60bd9eb50c543ab4504b41d54168f1e6496557..2ff4229bc2360f79fdb3c206018977a261eb1268 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -122,7 +122,7 @@ add_library(hfo-lib SHARED ${SOURCE_DIR}/HFO.hpp ${SOURCE_DIR}/HFO.cpp ${SOURCE_
 set_target_properties(hfo-lib PROPERTIES OUTPUT_NAME hfo)
 set_target_properties(hfo-lib PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/lib)
 
-add_library(hfo-c-lib SHARED ${CMAKE_CURRENT_SOURCE_DIR}/hfo/hfo_c_wrapper.cpp ${SOURCE_DIR}/HFO.cpp)
+add_library(hfo-c-lib SHARED ${CMAKE_CURRENT_SOURCE_DIR}/hfo/hfo_c_wrapper.cpp ${SOURCE_DIR}/HFO.cpp ${SOURCE_DIR}/agent.cpp)
 set_target_properties(hfo-c-lib PROPERTIES OUTPUT_NAME hfo_c)
 set_target_properties(hfo-c-lib PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/hfo)