diff --git a/Gir_Gst.toml b/Gir_Gst.toml
index 256f26860..72e995a38 100644
--- a/Gir_Gst.toml
+++ b/Gir_Gst.toml
@@ -50,7 +50,6 @@ generate = [
     "Gst.PadMode",
     "Gst.SchedulingFlags",
     "Gst.ChildProxy",
-    "Gst.Preset",
     "Gst.TagSetter",
     "Gst.QOSType",
     "Gst.EventType",
@@ -768,6 +767,15 @@ trait = false
         [object.function.return]
         bool_return_is_error = "Failed to add plugin"
 
+[[object]]
+name = "Gst.Preset"
+status = "generate"
+
+    [[object.function]]
+    name = "set_app_dir"
+        [object.function.return]
+        bool_return_is_error = "Failed to set app preset directory"
+
 [[object]]
 name = "Gst.*"
 status = "generate"
diff --git a/gstreamer/src/auto/preset.rs b/gstreamer/src/auto/preset.rs
index 55cbc45f2..d941a514d 100644
--- a/gstreamer/src/auto/preset.rs
+++ b/gstreamer/src/auto/preset.rs
@@ -2,6 +2,7 @@
 // DO NOT EDIT
 
 use ffi;
+use glib;
 use glib::object::IsA;
 use glib::translate::*;
 use glib_ffi;
@@ -25,10 +26,10 @@ impl Preset {
         }
     }
 
-    pub fn set_app_dir(app_dir: &str) -> bool {
+    pub fn set_app_dir(app_dir: &str) -> Result<(), glib::error::BoolError> {
         assert_initialized_main_thread!();
         unsafe {
-            from_glib(ffi::gst_preset_set_app_dir(app_dir.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::gst_preset_set_app_dir(app_dir.to_glib_none().0), "Failed to set app preset directory")
         }
     }
 }