diff --git a/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template b/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template
index a8a521caf8e..82807148224 100644
--- a/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template
+++ b/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -124,7 +124,7 @@ class UnixConstants {
 // fgetxattr error codes for absent attributes depend on the OS:
 #ifdef _ALLBSD_SOURCE
     static final int PREFIX_XATTR_NOT_FOUND = ENOATTR;
-#elif __linux__
+#elif defined(__linux__)
     static final int PREFIX_XATTR_NOT_FOUND = ENODATA;
 #else
     // not supported (dummy values will not be used at runtime).