diff --git a/girs/GstPbutils-1.0.gir b/girs/GstPbutils-1.0.gir
index 15d2e20cd8..63718f99ac 100644
--- a/girs/GstPbutils-1.0.gir
+++ b/girs/GstPbutils-1.0.gir
@@ -1255,7 +1255,7 @@ after usage.</doc>
       </method>
       <method name="get_stream_id" c:identifier="gst_discoverer_stream_info_get_stream_id">
         <source-position filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstdiscoverer.h"/>
-        <return-value transfer-ownership="none">
+        <return-value transfer-ownership="none" nullable="1">
           <doc xml:space="preserve" filename="../subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstdiscoverer-types.c">the stream ID of this stream. If you wish to
 use the stream ID after the life-time of @info you will need to copy it.</doc>
           <type name="utf8" c:type="const gchar*"/>
diff --git a/subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstdiscoverer-types.c b/subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstdiscoverer-types.c
index c0e2e109dd..dc76657a98 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstdiscoverer-types.c
+++ b/subprojects/gst-plugins-base/gst-libs/gst/pbutils/gstdiscoverer-types.c
@@ -693,7 +693,7 @@ gst_discoverer_stream_info_get_toc (GstDiscovererStreamInfo * info)
  * gst_discoverer_stream_info_get_stream_id:
  * @info: a #GstDiscovererStreamInfo
  *
- * Returns: (transfer none): the stream ID of this stream. If you wish to
+ * Returns: (transfer none) (nullable): the stream ID of this stream. If you wish to
  * use the stream ID after the life-time of @info you will need to copy it.
  */
 const gchar *