diff --git a/channels/chan_unistim.c b/channels/chan_unistim.c
index 86a2782352e7a4c2a21e905b65f895d158ff5b80..88f37fbec175f8e14f9db98d67d33c9f349a9689 100644
--- a/channels/chan_unistim.c
+++ b/channels/chan_unistim.c
@@ -4459,6 +4459,7 @@ static struct ast_channel *unistim_new(struct unistim_subchannel *sub, int state
 	ast_setstate(tmp, state);
 	if (state == AST_STATE_RING)
 		tmp->rings = 1;
+	tmp->adsicpe = AST_ADSI_UNAVAILABLE;
 	tmp->writeformat = fmt;
 	tmp->rawwriteformat = fmt;
 	tmp->readformat = fmt;