diff --git a/ipacm/src/IPACM_Wan.cpp b/ipacm/src/IPACM_Wan.cpp
index 0aec857..6381826 100644
--- a/ipacm/src/IPACM_Wan.cpp
+++ b/ipacm/src/IPACM_Wan.cpp
@@ -296,7 +296,8 @@
 	    	          dft_rt_rule_hdl[MAX_DEFAULT_v4_ROUTE_RULES + 2*num_dft_rt_v6],
 	    	          dft_rt_rule_hdl[MAX_DEFAULT_v4_ROUTE_RULES + 2*num_dft_rt_v6+1],num_dft_rt_v6);
 
-        if (num_dft_rt_v6 == 0)
+		/* add default filtering rules when wan-iface get global v6-prefix */
+        if (num_dft_rt_v6 == 1)
 	    {
 			if(m_is_sta_mode == Q6_WAN)
 			{