diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 190b51f2c5..6cf4a18f40 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -7384,11 +7384,13 @@ static int process_sdp(struct sip_pvt *p, struct sip_request *req, int t38action
 	return 0;
 }
 
+#ifdef LOW_MEMORY
 static void ts_ast_rtp_destroy(void *data)
 {
     struct ast_rtp *tmp = data;
     ast_rtp_destroy(tmp);
 }
+#endif
 
 /*! \brief Add header to SIP message */
 static int add_header(struct sip_request *req, const char *var, const char *value)