diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 2d7a8ab326..28d535a431 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -484,16 +484,15 @@ static int mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
         switch (st->codecpar->codec_type) {
         case AVMEDIA_TYPE_AUDIO:
             if (ts->flags & MPEGTS_FLAG_SYSTEM_B) {
-            if (st->codecpar->codec_id==AV_CODEC_ID_AC3) {
-                *q++=0x6a; // AC3 descriptor see A038 DVB SI
-                *q++=1; // 1 byte, all flags sets to 0
-                *q++=0; // omit all fields...
-            }
-            else if (st->codecpar->codec_id==AV_CODEC_ID_EAC3) {
-                *q++=0x7a; // EAC3 descriptor see A038 DVB SI
-                *q++=1; // 1 byte, all flags sets to 0
-                *q++=0; // omit all fields...
-            }
+                if (st->codecpar->codec_id==AV_CODEC_ID_AC3) {
+                    *q++=0x6a; // AC3 descriptor see A038 DVB SI
+                    *q++=1; // 1 byte, all flags sets to 0
+                    *q++=0; // omit all fields...
+                } else if (st->codecpar->codec_id==AV_CODEC_ID_EAC3) {
+                    *q++=0x7a; // EAC3 descriptor see A038 DVB SI
+                    *q++=1; // 1 byte, all flags sets to 0
+                    *q++=0; // omit all fields...
+                }
             }
             if (st->codecpar->codec_id==AV_CODEC_ID_S302M)
                 put_registration_descriptor(&q, MKTAG('B', 'S', 'S', 'D'));