Index: channels/chan_dahdi.c
===================================================================
--- channels/chan_dahdi.c	(revision 153123)
+++ channels/chan_dahdi.c	(working copy)
@@ -3606,7 +3606,9 @@
 		if (p->subs[SUB_THREEWAY].owner->_state == AST_STATE_RING) {
 			tone_zone_play_tone(p->subs[SUB_THREEWAY].dfd, DAHDI_TONE_RINGTONE);
 		}
-		 if (ast_channel_masquerade(p->subs[SUB_THREEWAY].owner, ast_bridged_channel(p->subs[SUB_REAL].owner))) {
+		pbx_builtin_setvar_helper(p->subs[SUB_THREEWAY].owner, "BLINDTRANSFER", p->subs[SUB_REAL].owner->name);
+		pbx_builtin_setvar_helper(p->subs[SUB_REAL].owner, "BLINDTRANSFER", p->subs[SUB_THREEWAY].owner->name);
+		if (ast_channel_masquerade(p->subs[SUB_THREEWAY].owner, ast_bridged_channel(p->subs[SUB_REAL].owner))) {
 			ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
 					ast_bridged_channel(p->subs[SUB_REAL].owner)->name, p->subs[SUB_THREEWAY].owner->name);
 			return -1;
@@ -3622,6 +3624,8 @@
 		if (p->subs[SUB_REAL].owner->_state == AST_STATE_RING) {
 			tone_zone_play_tone(p->subs[SUB_REAL].dfd, DAHDI_TONE_RINGTONE);
 		}
+		pbx_builtin_setvar_helper(p->subs[SUB_THREEWAY].owner, "BLINDTRANSFER", p->subs[SUB_REAL].owner->name);
+		pbx_builtin_setvar_helper(p->subs[SUB_REAL].owner, "BLINDTRANSFER", p->subs[SUB_THREEWAY].owner->name);
 		if (ast_channel_masquerade(p->subs[SUB_REAL].owner, ast_bridged_channel(p->subs[SUB_THREEWAY].owner))) {
 			ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
 					ast_bridged_channel(p->subs[SUB_THREEWAY].owner)->name, p->subs[SUB_REAL].owner->name);
Index: channels/chan_misdn.c
===================================================================
--- channels/chan_misdn.c	(revision 153123)
+++ channels/chan_misdn.c	(working copy)
@@ -3538,6 +3538,8 @@
 
 	holded_chan->state=MISDN_CONNECTED;
 	/* misdn_lib_transfer(holded_chan->bc); */
+	pbx_builtin_setvar_helper(tmp_ch->ast, "BLINDTRANSFER", holded_chan->ast->name);
+	pbx_builtin_setvar_helper(holded_chan->ast, "BLINDTRANSFER", tmp_ch->ast->name);
 	ast_channel_masquerade(holded_chan->ast, ast_bridged_channel(tmp_ch->ast));
 }
 
Index: channels/chan_mgcp.c
===================================================================
--- channels/chan_mgcp.c	(revision 153123)
+++ channels/chan_mgcp.c	(working copy)
@@ -2928,6 +2928,8 @@
 		if (p->sub->owner->_state == AST_STATE_RINGING) {
 			ast_indicate(ast_bridged_channel(p->sub->next->owner), AST_CONTROL_RINGING);
 		}
+		pbx_builtin_setvar_helper(p->sub->owner, "BLINDTRANSFER", p->sub->next->owner->name);
+		pbx_builtin_setvar_helper(p->sub->next->owner, "BLINDTRANSFER", p->sub->owner->name);
 		if (ast_channel_masquerade(p->sub->next->owner, ast_bridged_channel(p->sub->owner))) {
 			ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
 				ast_bridged_channel(p->sub->owner)->name, p->sub->next->owner->name);
@@ -2940,6 +2942,8 @@
 			ast_indicate(ast_bridged_channel(p->sub->next->owner), AST_CONTROL_RINGING);
 		}
 		ast_queue_control(p->sub->next->owner, AST_CONTROL_UNHOLD);
+		pbx_builtin_setvar_helper(p->sub->owner, "BLINDTRANSFER", p->sub->next->owner->name);
+		pbx_builtin_setvar_helper(p->sub->next->owner, "BLINDTRANSFER", p->sub->owner->name);
 		if (ast_channel_masquerade(p->sub->owner, ast_bridged_channel(p->sub->next->owner))) {
 			ast_log(LOG_WARNING, "Unable to masquerade %s as %s\n",
 				ast_bridged_channel(p->sub->next->owner)->name, p->sub->owner->name);
Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 153123)
+++ channels/chan_sip.c	(working copy)
@@ -14788,6 +14788,8 @@
 		transmit_notify_with_sipfrag(transferer, seqno, "200 OK", TRUE);
 		append_history(transferer, "Xfer", "Refer succeeded");
 		transferer->refer->status = REFER_200OK;
+		pbx_builtin_setvar_helper(transferer->owner, "BLINDTRANSFER", targetcall_pvt->owner->name);
+		pbx_builtin_setvar_helper(targetcall_pvt->owner, "BLINDTRANSFER", transferer->owner->name);
 		if (targetcall_pvt->owner) {
 			if (option_debug)
 				ast_log(LOG_DEBUG, "SIP attended transfer: Unlocking channel %s\n", targetcall_pvt->owner->name);
Index: res/res_features.c
===================================================================
--- res/res_features.c	(revision 153123)
+++ res/res_features.c	(working copy)
@@ -972,6 +972,8 @@
 	if ((features_datastore = ast_channel_datastore_find(newchan, &dial_features_info, NULL))) {
 		dialfeatures = features_datastore->data;
 	}
+	pbx_builtin_setvar_helper(transferer, "BLINDTRANSFER", newchan->name);
+	pbx_builtin_setvar_helper(newchan, "BLINDTRANSFER", transferer->name);
 	ast_channel_unlock(newchan);
 
 	if (dialfeatures) {