diff --git a/dune/uggrid/CMakeLists.txt b/dune/uggrid/CMakeLists.txt
index 8187c9ae990abc71d5a803dc98949a6f6b9494d3..8fa6d9cef3845c4664afda9159370c3d8f965389 100644
--- a/dune/uggrid/CMakeLists.txt
+++ b/dune/uggrid/CMakeLists.txt
@@ -25,8 +25,7 @@ target_sources(duneuggrid PRIVATE
   ugdevices.cc)
 
 target_sources_dims(duneuggrid PRIVATE
-  initug.cc
-  ugdevices.cc)
+  initug.cc)
 
 install(
   FILES ugdevices.h initug.h