diff --git a/CMakeLists.txt b/CMakeLists.txt
index e2f13da..027068f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,6 +26,7 @@ add_subdirectory(src/mars/stream)  # Streamable save format + gzip     (lib mars
 add_subdirectory(src/mars/rng)     # MT19937                            (lib mars_rng)
 add_subdirectory(src/game/config)  # flat KEY/value constants loader    (lib sots_game_config)
 add_subdirectory(src/game/data)    # typed catalogs on mars/parse+text  (lib game_data)
+add_subdirectory(src/game/effects)  # tech effects (TechId table + apply)  (lib game_effects)
 add_subdirectory(src/game/design)  # ship-design rules + derived stats  (lib game_design)
 
 # ---- shim trace/compare infrastructure (host-testable; linked into binkw32) ----
@@ -67,7 +68,7 @@ else()
   add_executable(addr_smoke tests/addr_smoke.cpp)
   target_link_libraries(addr_smoke PRIVATE sots_addresses)
   add_test(NAME addr_smoke COMMAND addr_smoke)
-  foreach(_t mars_parse game_config game_data game_design game_sim mars_stream mars_text mars_vfs shim_trace)
+  foreach(_t mars_parse game_config game_data game_design game_sim mars_stream mars_text mars_vfs shim_trace game_effects)
     if(EXISTS ${CMAKE_SOURCE_DIR}/tests/${_t}/CMakeLists.txt)
       add_subdirectory(tests/${_t})
     endif()