diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index bb57c49d66742df2b7868600c1cf74837cd8e9be..404b348699fe3fdbfe97197fe5a80bc0c43692c7 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3322,20 +3322,20 @@ static const char *find_alias(const char *name, const char *_default)
 		char * const fullname;
 		char * const shortname;
 	} aliases[] = {
-		{ "Content-Type", "c" },
-		{ "Content-Encoding", "e" },
-		{ "From", "f" },
-		{ "Call-ID", "i" },
-		{ "Contact", "m" },
-		{ "Content-Length", "l" },
-		{ "Subject", "s" },
-		{ "To", "t" },
-		{ "Supported", "k" },
-		{ "Refer-To", "r" },
-		{ "Referred-By", "b" },
-		{ "Allow-Events", "u" },
-		{ "Event", "o" },
-		{ "Via", "v" },
+		{ "Content-Type",	 "c" },
+		{ "Content-Encoding",	 "e" },
+		{ "From",		 "f" },
+		{ "Call-ID",		 "i" },
+		{ "Contact",		 "m" },
+		{ "Content-Length",	 "l" },
+		{ "Subject",		 "s" },
+		{ "To",			 "t" },
+		{ "Supported",		 "k" },
+		{ "Refer-To",		 "r" },
+		{ "Referred-By",	 "b" },
+		{ "Allow-Events",	 "u" },
+		{ "Event",		 "o" },
+		{ "Via",		 "v" },
 		{ "Accept-Contact",      "a" },
 		{ "Reject-Contact",      "j" },
 		{ "Request-Disposition", "d" },