diff --git a/gst/gstdebugutils.c b/gst/gstdebugutils.c
index 850a0e00e9..928638ecc1 100644
--- a/gst/gstdebugutils.c
+++ b/gst/gstdebugutils.c
@@ -822,7 +822,7 @@ gst_debug_bin_to_dot_data (GstBin * bin, GstDebugGraphDetails details)
 /*
  * gst_debug_bin_to_dot_file:
  * @bin: the top-level pipeline that should be analyzed
- * @file_name: output base filename (e.g. "myplayer")
+ * @file_name: (type filename): output base filename (e.g. "myplayer")
  *
  * To aid debugging applications one can use this method to write out the whole
  * network of gstreamer elements that form the pipeline into an dot file.
@@ -872,7 +872,7 @@ gst_debug_bin_to_dot_file (GstBin * bin, GstDebugGraphDetails details,
 /*
  * gst_debug_bin_to_dot_file_with_ts:
  * @bin: the top-level pipeline that should be analyzed
- * @file_name: output base filename (e.g. "myplayer")
+ * @file_name: (type filename): output base filename (e.g. "myplayer")
  *
  * This works like gst_debug_bin_to_dot_file(), but adds the current timestamp
  * to the filename, so that it can be used to take multiple snapshots.
diff --git a/gst/gstplugin.c b/gst/gstplugin.c
index 2e585877c4..8e63930164 100644
--- a/gst/gstplugin.c
+++ b/gst/gstplugin.c
@@ -667,7 +667,7 @@ static GMutex gst_plugin_loading_mutex;
 
 /**
  * gst_plugin_load_file:
- * @filename: the plugin filename to load
+ * @filename: (type filename): the plugin filename to load
  * @error: pointer to a %NULL-valued GError
  *
  * Loads the given plugin and refs it.  Caller needs to unref after use.
@@ -971,7 +971,7 @@ gst_plugin_get_description (GstPlugin * plugin)
  *
  * get the filename of the plugin
  *
- * Returns: the filename of the plugin
+ * Returns: (type filename): the filename of the plugin
  */
 const gchar *
 gst_plugin_get_filename (GstPlugin * plugin)
diff --git a/gst/gstregistry.c b/gst/gstregistry.c
index 983946ffc5..bada33e01b 100644
--- a/gst/gstregistry.c
+++ b/gst/gstregistry.c
@@ -1375,7 +1375,7 @@ gst_registry_scan_path_internal (GstRegistryScanContext * context,
 /**
  * gst_registry_scan_path:
  * @registry: the registry to add found plugins to
- * @path: the path to scan
+ * @path: (type filename): the path to scan
  *
  * Scan the given path for plugins to add to the registry. The syntax of the
  * path is specific to the registry.