Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 178702)
+++ channels/chan_sip.c	(working copy)
@@ -19692,6 +19692,8 @@
 		/* 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);
+		pbx_builtin_setvar_helper(current.chan2, "SIPTRANSFERER_PEERNAME", p->peername);
+		pbx_builtin_setvar_helper(current.chan2, "SIPTRANSFERER_USERNAME", p->username);
 	}
 	/* Generate a Replaces string to be used in the INVITE during attended transfer */
 	if (!ast_strlen_zero(p->refer->replaces_callid)) {
Index: doc/tex/channelvariables.tex
===================================================================
--- doc/tex/channelvariables.tex	(revision 178702)
+++ doc/tex/channelvariables.tex	(working copy)
@@ -927,6 +927,10 @@
 ${SIPURI}            * SIP uri
 ${SIP_CODEC}           Set the SIP codec for a call
 ${SIP_URI_OPTIONS}   * additional options to add to the URI for an outgoing call
+${SIPTRANSFERER_PEERNAME}   * Name of the SIP "peer" which initiated the blind 
+                              transfer, that is the party which sent the REFER.
+${SIPTRANSFERER_USERNAME}   * Name of the SIP "user" which initiated the blind 
+                              transfer, that is the party which sent the REFER.
 ${RTPAUDIOQOS}         RTCP QoS report for the audio of this call
 ${RTPVIDEOQOS}         RTCP QoS report for the video of this call
 \end{verbatim}