diff --git a/spectrum/src/sample2.cfg b/spectrum/src/sample2.cfg
index ae1f0d73d2e79766a92c2c348984b691c8b79e77..91ab58fc20fd7574e23f3cccfc2b1facf7456dea 100644
--- a/spectrum/src/sample2.cfg
+++ b/spectrum/src/sample2.cfg
@@ -24,7 +24,9 @@ port = 5222
 backend_host = localhost
 
 # Port on which Spectrum listens for backends.
-backend_port=10001
+# By default Spectrum chooses random backend port and there's
+# no need to change it normally
+#backend_port=10001
 
 # Full path to PKCS#12 cetficiate used for TLS in server mode.
 #cert=