diff --git a/trunk/src/libs/srs_lib_simple_socket.cpp b/trunk/src/libs/srs_lib_simple_socket.cpp
index a45c1d4d2..79d2bcf38 100644
--- a/trunk/src/libs/srs_lib_simple_socket.cpp
+++ b/trunk/src/libs/srs_lib_simple_socket.cpp
@@ -164,8 +164,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     {
         SrsBlockSyncSocket* skt = (SrsBlockSyncSocket*)ctx;
         
-        int sec = timeout_us / (1000 * 1000LL);
-        int microsec = timeout_us / 1000LL % 1000;
+        int sec = (int)(timeout_us / 1000000LL);
+        int microsec = (int)(timeout_us % 1000000LL);
         
         sec = srs_max(0, sec);
         microsec = srs_max(0, microsec);
@@ -192,8 +192,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     {
         SrsBlockSyncSocket* skt = (SrsBlockSyncSocket*)ctx;
         
-        int sec = timeout_us / (1000 * 1000LL);
-        int microsec = timeout_us / 1000LL % 1000;
+        int sec = (int)(timeout_us / 1000000LL);
+        int microsec = (int)(timeout_us % 1000000LL);
 
         sec = srs_max(0, sec);
         microsec = srs_max(0, microsec);