diff --git a/lib/umoddi3.c b/lib/umoddi3.c
index 81994d5..807bb5c 100644
--- a/lib/umoddi3.c
+++ b/lib/umoddi3.c
@@ -1,21 +1,22 @@
-//===-- umoddi3.c - Implement __umoddi3 -----------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements __umoddi3 for the compiler_rt library.
-//
-//===----------------------------------------------------------------------===//
+/* ===-- umoddi3.c - Implement __umoddi3 -----------------------------------===
+ *
+ *                    The LLVM Compiler Infrastructure
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ *
+ * This file implements __umoddi3 for the compiler_rt library.
+ *
+ * ===----------------------------------------------------------------------===
+ */
 
 #include "int_lib.h"
 
 du_int __udivmoddi4(du_int a, du_int b, du_int* rem);
 
-// Returns: a % b
+/* Returns: a % b */
 
 du_int
 __umoddi3(du_int a, du_int b)