Index: src/modules/rls/utils.c
--- src/modules/rls/utils.c.orig
+++ src/modules/rls/utils.c
@@ -26,14 +26,14 @@
 #define SIP_PREFIX        "sip:"
 #define SIP_PREFIX_LEN    sizeof(SIP_PREFIX)-1
 
-str* normalize_sip_uri(const str *uri)
+str* normalize_sip_uri(str *uri)
 {
 	static str normalized_uri;
 	static str null_str = {NULL, 0};
 	static char buf[MAX_URI_SIZE];
 
 	normalized_uri.s = buf;
-	if (un_escape((str *)uri, &normalized_uri) < 0)
+	if (un_escape(uri, &normalized_uri) < 0)
 	{
 		LM_ERR("un-escaping URI\n");
 		return &null_str;