diff --git a/lib/vauth/ntlm.h b/lib/vauth/ntlm.h
index 5d0f0d24c6..4dfda55453 100644
--- a/lib/vauth/ntlm.h
+++ b/lib/vauth/ntlm.h
@@ -34,7 +34,8 @@
 /* Stuff only required for curl_ntlm_msgs.c */
 #ifdef BUILDING_CURL_NTLM_MSGS_C
 
-/* Flag bits definitions based on https://davenport.sourceforge.net/ntlm.html */
+/* Flag bits definitions based on
+   https://davenport.sourceforge.net/ntlm.html */
 
 #define NTLMFLAG_NEGOTIATE_UNICODE               (1<<0)
 /* Indicates that Unicode strings are supported for use in security buffer