diff --git a/src/fs/io/FileOutputStream.cxx b/src/fs/io/FileOutputStream.cxx
index 51f73678a..b07ca487b 100644
--- a/src/fs/io/FileOutputStream.cxx
+++ b/src/fs/io/FileOutputStream.cxx
@@ -270,12 +270,7 @@ FileOutputStream::Commit()
 #endif
 
 	if (!Close()) {
-#ifdef _WIN32
-		throw FormatLastError("Failed to commit %s",
-				      path.ToUTF8().c_str());
-#else
 		throw FormatErrno("Failed to commit %s", path.c_str());
-#endif
 	}
 }