diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index 78ce829f8..246dcfd62 100644
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -944,6 +944,11 @@ srs_error_t SrsRtmpConn::acquire_publish(SrsLiveSource* source)
     
     SrsRequest* req = info->req;
 
+    // Check whether RTMP stream is busy.
+    if (!source->can_publish(info->edge)) {
+        return srs_error_new(ERROR_SYSTEM_STREAM_BUSY, "rtmp: stream %s is busy", req->get_stream_url().c_str());
+    }
+    
     // Check whether RTC stream is busy.
 #ifdef SRS_RTC
     SrsRtcSource *rtc = NULL;
@@ -955,16 +960,11 @@ srs_error_t SrsRtmpConn::acquire_publish(SrsLiveSource* source)
         }
 
         if (!rtc->can_publish()) {
-            return srs_error_new(ERROR_RTC_SOURCE_BUSY, "rtc stream %s busy", req->get_stream_url().c_str());
+            return srs_error_new(ERROR_SYSTEM_STREAM_BUSY, "rtc stream %s busy", req->get_stream_url().c_str());
         }
     }
 #endif
 
-    // Check whether RTMP stream is busy.
-    if (!source->can_publish(info->edge)) {
-        return srs_error_new(ERROR_SYSTEM_STREAM_BUSY, "rtmp: stream %s is busy", req->get_stream_url().c_str());
-    }
-
     // Bridge to RTC streaming.
 #if defined(SRS_RTC) && defined(SRS_FFMPEG_FIT)
     if (rtc) {