diff --git a/NEWS b/NEWS
index 208ba1069..138630967 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 ver 0.16.4 (2010/??/??)
 * decoder:
   - ffmpeg: workaround for semantic API change in recent ffmpeg versions
+  - flac: validate the sample rate when scanning the tag
 
 
 ver 0.16.3 (2011/06/04)
diff --git a/src/decoder/flac_metadata.c b/src/decoder/flac_metadata.c
index f2f2f954d..5b94fd426 100644
--- a/src/decoder/flac_metadata.c
+++ b/src/decoder/flac_metadata.c
@@ -224,7 +224,8 @@ flac_tag_apply_metadata(struct tag *tag, const char *track,
 		break;
 
 	case FLAC__METADATA_TYPE_STREAMINFO:
-		tag->time = flac_duration(&block->data.stream_info);
+		if (block->data.stream_info.sample_rate > 0)
+			tag->time = flac_duration(&block->data.stream_info);
 		break;
 
 	default:
diff --git a/src/decoder/flac_metadata.h b/src/decoder/flac_metadata.h
index 06e691d1d..e52b0fb82 100644
--- a/src/decoder/flac_metadata.h
+++ b/src/decoder/flac_metadata.h
@@ -20,6 +20,7 @@
 #ifndef MPD_FLAC_METADATA_H
 #define MPD_FLAC_METADATA_H
 
+#include <assert.h>
 #include <stdbool.h>
 #include <FLAC/metadata.h>
 
@@ -29,6 +30,8 @@ struct replay_gain_info;
 static inline unsigned
 flac_duration(const FLAC__StreamMetadata_StreamInfo *stream_info)
 {
+	assert(stream_info->sample_rate > 0);
+
 	return (stream_info->total_samples + stream_info->sample_rate - 1) /
 		stream_info->sample_rate;
 }