diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index e2d8d698ba..c60b1754be 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -3171,6 +3171,8 @@ srs_error_t SrsConfig::raw_disable_vhost(string vhost, bool& applied)
     applied = false;
     
     SrsConfDirective* conf = root->get("vhost", vhost);
+    srs_assert(conf);
+
     conf->get_or_create("enabled")->set_arg0("off");
     
     if ((err = do_reload_vhost_removed(vhost)) != srs_success) {
@@ -3189,6 +3191,8 @@ srs_error_t SrsConfig::raw_enable_vhost(string vhost, bool& applied)
     applied = false;
     
     SrsConfDirective* conf = root->get("vhost", vhost);
+    srs_assert(conf);
+
     conf->get_or_create("enabled")->set_arg0("on");
     
     if ((err = do_reload_vhost_added(vhost)) != srs_success) {
@@ -3207,6 +3211,8 @@ srs_error_t SrsConfig::raw_enable_dvr(string vhost, string stream, bool& applied
     applied = false;
     
     SrsConfDirective* conf = root->get("vhost", vhost);
+    srs_assert(conf);
+
     conf = conf->get_or_create("dvr")->get_or_create("dvr_apply");
     
     if (conf->args.size() == 1 && (conf->arg0() == "all" || conf->arg0() == "none")) {
@@ -3233,6 +3239,8 @@ srs_error_t SrsConfig::raw_disable_dvr(string vhost, string stream, bool& applie
     applied = false;
     
     SrsConfDirective* conf = root->get("vhost", vhost);
+    srs_assert(conf);
+
     conf = conf->get_or_create("dvr")->get_or_create("dvr_apply");
     
     std::vector<string>::iterator it;
diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index 5087a825ef..81c7add7e0 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -1206,7 +1206,12 @@ srs_error_t SrsGoApiRaw::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage*
             if (action != "enable" && action != "disable") {
                 return srs_api_response_code(w, r, ERROR_SYSTEM_CONFIG_RAW_NOT_ALLOWED);
             }
-            
+
+            // the vhost must exists.
+            if (!_srs_config->get_vhost(value, false)) {
+                return srs_api_response_code(w, r, ERROR_SYSTEM_CONFIG_RAW_PARAMS);
+            }
+
             if (!_srs_config->get_dvr_enabled(value)) {
                 return srs_api_response_code(w, r, ERROR_SYSTEM_CONFIG_RAW_NOT_ALLOWED);
             }