diff --git a/ext/soup/gstsouphttpsrc.c b/ext/soup/gstsouphttpsrc.c
index 1a94576f97..c50fd3e84e 100644
--- a/ext/soup/gstsouphttpsrc.c
+++ b/ext/soup/gstsouphttpsrc.c
@@ -318,7 +318,7 @@ gst_soup_http_src_reset (GstSoupHTTPSrc * src)
   src->interrupted = FALSE;
   src->retry = FALSE;
   src->have_size = FALSE;
-  src->seekable = TRUE;
+  src->seekable = FALSE;
   src->read_position = 0;
   src->request_position = 0;
 
@@ -751,6 +751,7 @@ gst_soup_http_src_got_headers_cb (SoupMessage * msg, GstSoupHTTPSrc * src)
     if (!src->have_size || (src->content_size != newsize)) {
       src->content_size = newsize;
       src->have_size = TRUE;
+      src->seekable = TRUE;
       GST_DEBUG_OBJECT (src, "size = %" G_GUINT64_FORMAT, src->content_size);
 
       basesrc = GST_BASE_SRC_CAST (src);