diff --git a/python/app4triqs/CMakeLists.txt b/python/app4triqs/CMakeLists.txt
index 4a14759e..46111dd8 100644
--- a/python/app4triqs/CMakeLists.txt
+++ b/python/app4triqs/CMakeLists.txt
@@ -13,7 +13,7 @@ endforeach()
 foreach(gen ${wrap_generators})
   string(REPLACE "_desc.py" "" module_name ${gen})
   add_cpp2py_module(${module_name})
-  target_link_libraries(${module_name} app4triqs_c)
+  target_link_libraries(${module_name} PRIVATE app4triqs_c)
   target_compile_options(${module_name} PUBLIC $<$<CXX_COMPILER_ID:GNU>:-Wno-attributes>)
 endforeach()