diff --git a/winsup/cygwin/include/endian.h b/winsup/cygwin/include/endian.h
index 1448d8cdd..0f91ad85c 100644
--- a/winsup/cygwin/include/endian.h
+++ b/winsup/cygwin/include/endian.h
@@ -13,5 +13,5 @@ details. */
 
 #include <machine/endian.h>
 
-#endif /* _IO_H_ */
+#endif