diff --git a/src/modules/siputils/doc/siputils_admin.xml b/src/modules/siputils/doc/siputils_admin.xml
index 4b37d8109e6..a6263a628f1 100644
--- a/src/modules/siputils/doc/siputils_admin.xml
+++ b/src/modules/siputils/doc/siputils_admin.xml
@@ -1093,9 +1093,13 @@ if (is_supported("outbound")) { ... }
original sender. For incoming SIP requests, it means there is only
one Via header. For incoming SIP replies, it means that top
Record-Route URI is 'myself' and source address is not matching it
- (to avoid detecting in case of local loops). Note that it does not
- detect spirals, which can have the condition for replies true also
- in the case of additional SIP reply receival.
+ (to avoid detecting in case of local loops). The detection is done
+ only when Record-Route has an IP address in its URI (for a domain,
+ it returns -1/false).
+
+
+ Note that it does not detect spirals, which can have the condition
+ for replies true also in the case of additional SIP reply reception.
This function can be used from ANY_ROUTE.