diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index a8d5d38129..029d894689 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -473,9 +473,9 @@ static int mpegts_write_header(AVFormatContext *s)
 
     total_bit_rate +=
         total_bit_rate *  4 / TS_PACKET_SIZE           + /* TS  header size */
-        SDT_RETRANS_TIME * 8 * sdt_size     / 1000     + /* SDT size */
-        PAT_RETRANS_TIME * 8 * pat_pmt_size / 1000     + /* PAT+PMT size */
-        PCR_RETRANS_TIME * 8 * 8            / 1000;      /* PCR size */
+        1000 * 8 * sdt_size     / PAT_RETRANS_TIME     + /* SDT size */
+        1000 * 8 * pat_pmt_size / SDT_RETRANS_TIME     + /* PAT+PMT size */
+        1000 * 8 * 8            / PCR_RETRANS_TIME;      /* PCR size */
 
     av_log(s, AV_LOG_DEBUG, "muxrate %d freq sdt %d pat %d\n",
            total_bit_rate, ts->sdt_packet_period, ts->pat_packet_period);