diff --git a/core/src/CMakeLists.txt b/core/src/CMakeLists.txt
index 1b9cad0e4..4272f0e08 100644
--- a/core/src/CMakeLists.txt
+++ b/core/src/CMakeLists.txt
@@ -1,6 +1,6 @@
 # Sources for the main neXtSIM model
 
-if(USE_XIOS)
+if(ENABLE_XIOS)
     set(ParaGridIOImpl "ParaGridIO_Xios")
 else()
     set(ParaGridIOImpl "ParaGridIO")
@@ -18,7 +18,6 @@ set(BaseSources
     "CommonRestartMetadata.cpp"
     "RectGridIO.cpp"
     "${ParaGridIOImpl}.cpp"
-    "ParaGridIO_Xios.cpp"
     "FileCallbackCloser.cpp"
     "Finalizer.cpp"
     "DevStep.cpp"