diff --git a/NEWS b/NEWS
index db85d23fc..1c7d4dc1e 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,6 @@
 ver 0.15.15 (2010/??/??)
+* input:
+  - rewind: fix assertion failure
 
 
 ver 0.15.14 (2010/11/06)
diff --git a/src/input/rewind_input_plugin.c b/src/input/rewind_input_plugin.c
index 1927c525a..9e57e6999 100644
--- a/src/input/rewind_input_plugin.c
+++ b/src/input/rewind_input_plugin.c
@@ -84,7 +84,7 @@ copy_attributes(struct input_stream *dest)
 	const struct input_stream *src = &r->input;
 
 	assert(dest != src);
-	assert(dest->mime != src->mime);
+	assert(src->mime == NULL || dest->mime != src->mime);
 
 	dest->ready = src->ready;
 	dest->seekable = src->seekable;