diff --git a/Platform/user/configm/config-server/dhcp_config/dhcp_subnet_config.c b/Platform/user/configm/config-server/dhcp_config/dhcp_subnet_config.c
index e032b4bfc..d53ffd0ca 100644
--- a/Platform/user/configm/config-server/dhcp_config/dhcp_subnet_config.c
+++ b/Platform/user/configm/config-server/dhcp_config/dhcp_subnet_config.c
@@ -125,7 +125,7 @@ ret_code dhcp_subnet_config_proc(uint source, uint config_type,
             */
 
             //Ìí¼Ó½Ó¿Ú     
-            snprintf(cmd, len, "sed -r -i 's/INTERFACESv4=\"/INTERFACESv4=\"%s /g' /etc/default/isc-dhcp-server", interface->valuestring);
+            snprintf(cmd, len, "sed -r -i 's/INTERFACES=\"/INTERFACES=\"%s /g' /etc/default/isc-dhcp-server", interface->valuestring);
             system(cmd);
             memset(cmd, 0, len + 1);
             snprintf(cmd, len, "echo -e 'subnet %s netmask %s {\\n range %s;\\n option subnet-mask %s;\\n option routers %s;' >> /etc/dhcp/dhcpd.conf",