diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 0b9129e5d..d78988895 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -4730,9 +4730,9 @@ bool SrsConfig::get_tcp_nodelay(string vhost)
     return SRS_CONF_PERFER_FALSE(conf->arg0());
 }
 
-double SrsConfig::get_send_min_interval(string vhost)
+srs_utime_t SrsConfig::get_send_min_interval(string vhost)
 {
-    static double DEFAULT = 0.0;
+    static srs_utime_t DEFAULT = 0;
     
     SrsConfDirective* conf = get_vhost(vhost);
     if (!conf) {
@@ -4749,7 +4749,7 @@ double SrsConfig::get_send_min_interval(string vhost)
         return DEFAULT;
     }
     
-    return ::atof(conf->arg0().c_str());
+    return srs_utime_t(::atof(conf->arg0().c_str()) * SRS_UTIME_MILLISECONDS);
 }
 
 bool SrsConfig::get_reduce_sequence_header(string vhost)
diff --git a/trunk/src/app/srs_app_config.hpp b/trunk/src/app/srs_app_config.hpp
index 70707f10e..697e23ec0 100644
--- a/trunk/src/app/srs_app_config.hpp
+++ b/trunk/src/app/srs_app_config.hpp
@@ -796,9 +796,9 @@ public:
      */
     virtual bool get_tcp_nodelay(std::string vhost);
     /**
-     * the minimal send interval in ms.
+     * the minimal send interval in srs_utime_t.
      */
-    virtual double get_send_min_interval(std::string vhost);
+    virtual srs_utime_t get_send_min_interval(std::string vhost);
     /**
      * whether reduce the sequence header.
      */
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index 4e9323ca5..886174841 100644
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -265,9 +265,9 @@ srs_error_t SrsRtmpConn::on_reload_vhost_play(string vhost)
     
     // send_min_interval
     if (true) {
-        double v = _srs_config->get_send_min_interval(vhost);
+        srs_utime_t v = _srs_config->get_send_min_interval(vhost);
         if (v != send_min_interval) {
-            srs_trace("apply smi %.2f=>%.2f", send_min_interval, v);
+            srs_trace("apply smi %d=>%d ms", srsu2msi(send_min_interval), srsu2msi(v));
             send_min_interval = v;
         }
     }
@@ -692,8 +692,8 @@ srs_error_t SrsRtmpConn::do_playing(SrsSource* source, SrsConsumer* consumer, Sr
     // initialize the send_min_interval
     send_min_interval = _srs_config->get_send_min_interval(req->vhost);
     
-    srs_trace("start play smi=%.2f, mw_sleep=%d, mw_enabled=%d, realtime=%d, tcp_nodelay=%d",
-        send_min_interval, srsu2msi(mw_sleep), mw_enabled, realtime, tcp_nodelay);
+    srs_trace("start play smi=%dms, mw_sleep=%d, mw_enabled=%d, realtime=%d, tcp_nodelay=%d",
+        srsu2msi(send_min_interval), srsu2msi(mw_sleep), mw_enabled, realtime, tcp_nodelay);
     
     while (true) {
         // collect elapse for pithy print.
@@ -788,7 +788,7 @@ srs_error_t SrsRtmpConn::do_playing(SrsSource* source, SrsConsumer* consumer, Sr
         
         // apply the minimal interval for delivery stream in ms.
         if (send_min_interval > 0) {
-            srs_usleep((int64_t)(send_min_interval * 1000));
+            srs_usleep(send_min_interval);
         }
     }
     
diff --git a/trunk/src/app/srs_app_rtmp_conn.hpp b/trunk/src/app/srs_app_rtmp_conn.hpp
index 2e55ffe1a..458f39b19 100644
--- a/trunk/src/app/srs_app_rtmp_conn.hpp
+++ b/trunk/src/app/srs_app_rtmp_conn.hpp
@@ -116,8 +116,8 @@ private:
     // for realtime
     // @see https://github.com/ossrs/srs/issues/257
     bool realtime;
-    // the minimal interval in ms for delivery stream.
-    double send_min_interval;
+    // the minimal interval in srs_utime_t for delivery stream.
+    srs_utime_t send_min_interval;
     // publish 1st packet timeout in srs_utime_t
     srs_utime_t publish_1stpkt_timeout;
     // publish normal packet timeout in srs_utime_t
diff --git a/trunk/src/utest/srs_utest_config.cpp b/trunk/src/utest/srs_utest_config.cpp
index 0a05b854c..e59662c87 100644
--- a/trunk/src/utest/srs_utest_config.cpp
+++ b/trunk/src/utest/srs_utest_config.cpp
@@ -1878,9 +1878,11 @@ VOID TEST(ConfigUnitTest, CheckDefaultValuesVhost)
     if (true) {
 	    EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF));
 	    EXPECT_EQ(30 * SRS_UTIME_SECONDS, conf.get_queue_length(""));
+	    EXPECT_EQ(0, conf.get_send_min_interval(""));
 
-	    EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF"vhost v{play{queue_length 100;}}"));
+	    EXPECT_TRUE(ERROR_SUCCESS == conf.parse(_MIN_OK_CONF"vhost v{play{queue_length 100;send_min_interval 10;}}"));
 	    EXPECT_EQ(100 * SRS_UTIME_SECONDS, conf.get_queue_length("v"));
+	    EXPECT_EQ(10 * SRS_UTIME_MILLISECONDS, conf.get_send_min_interval("v"));
     }
 }