diff --git a/airoha/an7581/UNION_AN7581_KITE_LOGAN_KERNEL_5_4_demo.mak b/airoha/an7581/UNION_AN7581_KITE_LOGAN_KERNEL_5_4_demo.mak
index 689532c75e75d506e75d0edf6573365b4db1a904..13297475c6e55473c9d584610dc133458f96b8b9 100644
--- a/airoha/an7581/UNION_AN7581_KITE_LOGAN_KERNEL_5_4_demo.mak
+++ b/airoha/an7581/UNION_AN7581_KITE_LOGAN_KERNEL_5_4_demo.mak
@@ -358,7 +358,7 @@ TCSUPPORT_ETHER_8811=y
 TCSUPPORT_VOIP=y
 TCSUPPORT_ECN_SIP=y
 TCSUPPORT_ECN_MEGACO=y
-VOIP_MAX_CHAN=8
+VOIP_MAX_CHAN=2
 TCSUPPORT_CWMP=y
 # TCSUPPORT_CWMP_CRPORTCHANGE is not set
 # TCSUPPORT_CWMP_PRECISE_TIME is not set