diff --git a/CMakeLists.txt b/CMakeLists.txt
index 01793d963f..cb42c8fad5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@ include(CTest)
 #--- options ------------------------------------------------------------------
 
 
-set(WITH_ACTS OFF CACHE STRING "Build analyzers that need Acts")
+set(WITH_ACTS AUTO CACHE STRING "Build analyzers that need Acts")
 set_property(CACHE WITH_ACTS PROPERTY STRINGS AUTO ON OFF)
 
 set(WITH_DD4HEP AUTO CACHE STRING "Build analyzers that need DD4hep")