Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 181654)
+++ channels/chan_sip.c	(working copy)
@@ -12322,6 +12340,10 @@
 		if (p->owner) {
 			pbx_builtin_setvar_helper(p->owner, "SIPREDIRECTURI", uri);
 			pbx_builtin_setvar_helper(p->owner, "SIPDOMAIN", domain);
+			if (!ast_strlen_zero(p->peername))
+				pbx_builtin_setvar_helper(p->owner, "FORWARDER_SIPPEER", p->peername);
+			else
+				pbx_builtin_setvar_helper(p->owner, "FORWARDER_SIPPEER", p->username);
 			ast_string_field_set(p->owner, call_forward, s);
 		}
 	}
@@ -15238,6 +15260,10 @@
 		/* Attended transfer to remote host, prepare headers for the INVITE */
 		if (p->refer->referred_by) 
 			pbx_builtin_setvar_helper(current.chan2, "_SIPTRANSFER_REFERER", p->refer->referred_by);
+		if (!ast_strlen_zero(p->peername))
+			pbx_builtin_setvar_helper(current.chan2, "TRANSFERER_SIPPEER", p->peername);
+		else
+			pbx_builtin_setvar_helper(current.chan2, "TRANSFERER_SIPPEER", p->username);
 	}
 	/* Generate a Replaces string to be used in the INVITE during attended transfer */
 	if (p->refer->replaces_callid && !ast_strlen_zero(p->refer->replaces_callid)) {
Index: apps/app_dial.c
===================================================================
--- apps/app_dial.c	(revision 181654)
+++ apps/app_dial.c	(working copy)
@@ -489,6 +489,7 @@
 				char *stuff;
 				char *tech;
 				int cause;
+				const char *forward_sippeer = pbx_builtin_getvar_helper(c, "FORWARDER_SIPPEER");
 
 				ast_copy_string(tmpchan, c->call_forward, sizeof(tmpchan));
 				if ((stuff = strchr(tmpchan, '/'))) {
@@ -516,6 +517,7 @@
 							ast_channel_make_compatible(o->chan, in);
 						ast_channel_inherit_variables(in, o->chan);
 						ast_channel_datastore_inherit(in, o->chan);
+						pbx_builtin_setvar_helper(o->chan, "FORWARDER_SIPPEER", forward_sippeer);
 					} else
 						ast_log(LOG_NOTICE, "Unable to create local channel for call forward to '%s/%s' (cause = %d)\n", tech, stuff, cause);
 				}