diff --git a/CMakeLists.txt b/CMakeLists.txt
index b9b28560..02c30bf3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,6 +49,7 @@ endif()
 
 # early find_package() experiment
 find_package(indentlog CONFIG REQUIRED)
+find_package(refcnt2 CONFIG REQUIRED)
 
 # ----------------------------------------------------------------
 # sources