diff --git a/pkg/sip/inbound.go b/pkg/sip/inbound.go
index 7b6e04a..cf9b5ca 100644
--- a/pkg/sip/inbound.go
+++ b/pkg/sip/inbound.go
@@ -787,6 +787,8 @@ func (c *inboundCall) transferCall(ctx context.Context, transferTo string, dialt
 		defer func() {
 			if err != nil && !c.done.Load() {
 				c.lkRoom.SwapOutput(w)
+			} else {
+				w.Close()
 			}
 		}()
 
diff --git a/pkg/sip/outbound.go b/pkg/sip/outbound.go
index 6d0f811..83c7e5a 100644
--- a/pkg/sip/outbound.go
+++ b/pkg/sip/outbound.go
@@ -446,6 +446,8 @@ func (c *outboundCall) transferCall(ctx context.Context, transferTo string, dial
 		defer func() {
 			if err != nil && !c.stopped.IsBroken() {
 				c.lkRoom.SwapOutput(w)
+			} else {
+				w.Close()
 			}
 		}()