diff --git a/dash/ngx_rtmp_dash_module.c b/dash/ngx_rtmp_dash_module.c
index 0de9a27..5d7cc66 100644
--- a/dash/ngx_rtmp_dash_module.c
+++ b/dash/ngx_rtmp_dash_module.c
@@ -273,7 +273,7 @@ ngx_rtmp_dash_write_playlist(ngx_rtmp_session_t *s)
 
 #define NGX_RTMP_DASH_MANIFEST_VIDEO                                           \
     "    <AdaptationSet\n"                                                     \
-    "        id=\"1\"\n"						       \
+    "        id=\"1\"\n"                                                       \
     "        segmentAlignment=\"true\"\n"                                      \
     "        maxWidth=\"%ui\"\n"                                               \
     "        maxHeight=\"%ui\"\n"                                              \
@@ -309,7 +309,7 @@ ngx_rtmp_dash_write_playlist(ngx_rtmp_session_t *s)
 
 #define NGX_RTMP_DASH_MANIFEST_AUDIO                                           \
     "    <AdaptationSet\n"                                                     \
-    "        id=\"2\"\n"						       \
+    "        id=\"2\"\n"                                                       \
     "        segmentAlignment=\"true\">\n"                                     \
     "      <AudioChannelConfiguration\n"                                       \
     "          schemeIdUri=\"urn:mpeg:dash:"                                   \
@@ -386,7 +386,7 @@ ngx_rtmp_dash_write_playlist(ngx_rtmp_session_t *s)
                          codec_ctx->width, 
                          codec_ctx->height,
                          codec_ctx->frame_rate,
-			 &ctx->name,
+                         &ctx->name,
                          codec_ctx->width, 
                          codec_ctx->height,
                          codec_ctx->frame_rate,
@@ -407,7 +407,7 @@ ngx_rtmp_dash_write_playlist(ngx_rtmp_session_t *s)
 
     if (ctx->has_audio) {
         p = ngx_slprintf(buffer, last, NGX_RTMP_DASH_MANIFEST_AUDIO,
-			 &ctx->name, 
+                         &ctx->name,
                          codec_ctx->audio_codec_id == NGX_RTMP_AUDIO_AAC ?
                          "40.2" : "6b",
                          codec_ctx->sample_rate,
@@ -1191,7 +1191,7 @@ ngx_rtmp_dash_video(ngx_rtmp_session_t *s, ngx_rtmp_header_t *h,
     if (htype != 1) {
         return NGX_OK;
     }
-    
+
     p = (u_char *) &delay;
 
     p[0] = in->buf->pos[4];