diff --git a/src/fs/io/FileOutputStream.cxx b/src/fs/io/FileOutputStream.cxx
index d6384630b..259a2d39d 100644
--- a/src/fs/io/FileOutputStream.cxx
+++ b/src/fs/io/FileOutputStream.cxx
@@ -166,6 +166,8 @@ FileOutputStream::OpenCreate(bool visible)
 					  GetPath().c_str());
 #ifdef HAVE_LINKAT
 	}
+#else
+	(void)visible;
 #endif
 }