diff --git a/dom/media/gstreamer/GStreamerFunctionList.h b/dom/media/gstreamer/GStreamerFunctionList.h
index ebdeeb6aa3ee..75f352ec0dec 100644
--- a/dom/media/gstreamer/GStreamerFunctionList.h
+++ b/dom/media/gstreamer/GStreamerFunctionList.h
@@ -48,6 +48,7 @@ GST_FUNC(LIBGSTREAMER, gst_element_set_state)
 GST_FUNC(LIBGSTREAMER, gst_flow_get_name)
 GST_FUNC(LIBGSTREAMER, gst_init)
 GST_FUNC(LIBGSTREAMER, gst_init_check)
+GST_FUNC(LIBGSTREAMER, gst_iterator_free)
 GST_FUNC(LIBGSTREAMER, gst_iterator_next)
 GST_FUNC(LIBGSTREAMER, gst_message_parse_error)
 GST_FUNC(LIBGSTREAMER, gst_message_type_get_name)
diff --git a/dom/media/gstreamer/GStreamerReader.cpp b/dom/media/gstreamer/GStreamerReader.cpp
index 2221ef9c137d..8cc4953f573f 100644
--- a/dom/media/gstreamer/GStreamerReader.cpp
+++ b/dom/media/gstreamer/GStreamerReader.cpp
@@ -607,6 +607,8 @@ nsresult GStreamerReader::CheckSupportedFormats()
     }
   }
 
+  gst_iterator_free(it);
+
   return unsupported ? NS_ERROR_FAILURE : NS_OK;
 }