diff --git a/src/modules/uac/doc/uac_admin.xml b/src/modules/uac/doc/uac_admin.xml
index a15fbbc90b2..2cdee2f66f7 100644
--- a/src/modules/uac/doc/uac_admin.xml
+++ b/src/modules/uac/doc/uac_admin.xml
@@ -1508,7 +1508,7 @@ event_route[uac:reply] {
 		</itemizedlist>
 		</para>
 		<para>
-			Use a dot (.) if no value should be set for auth_password, auth_ha1,
+			Use a dot (.) if no value should be set for realm, auth_password, auth_ha1, socket
 			or contact_addr.
 		</para>
 
diff --git a/src/modules/uac/uac_reg.c b/src/modules/uac/uac_reg.c
index 85fe266c92c..02138101c07 100644
--- a/src/modules/uac/uac_reg.c
+++ b/src/modules/uac/uac_reg.c
@@ -2170,6 +2170,11 @@ static void rpc_uac_reg_add(rpc_t* rpc, void* ctx)
 		return;
 	}
 
+	if(reg.realm.len==1 && reg.realm.s[0] == '.') {
+		reg.realm.s = NULL;
+		reg.realm.len = 0;
+	}
+
 	if(reg.auth_password.len==1 && reg.auth_password.s[0] == '.') {
 		reg.auth_password.s = NULL;
 		reg.auth_password.len = 0;
@@ -2180,6 +2185,11 @@ static void rpc_uac_reg_add(rpc_t* rpc, void* ctx)
 		reg.auth_ha1.len = 0;
 	}
 
+	if(reg.socket.len==1 && reg.socket.s[0] == '.') {
+		reg.socket.s = NULL;
+		reg.socket.len = 0;
+	}
+
 	if(reg.contact_addr.len==1 && reg.contact_addr.s[0] == '.') {
 		reg.contact_addr = reg_contact_addr;
 	}