diff --git a/Gir_Gst.toml b/Gir_Gst.toml
index eccf441c5..8cc03ee95 100644
--- a/Gir_Gst.toml
+++ b/Gir_Gst.toml
@@ -379,6 +379,11 @@ status = "generate"
         [object.function.return]
         nullable = false
 
+    [[object.function]]
+    name = "start"
+        [object.function.return]
+        bool_return_is_error = "Failed to start"
+
 [[object]]
 name = "Gst.DeviceMonitor"
 status = "generate"
@@ -387,6 +392,11 @@ status = "generate"
         [object.function.return]
         nullable = false
 
+    [[object.function]]
+    name = "start"
+        [object.function.return]
+        bool_return_is_error = "Failed to start"
+
 [[object]]
 name = "Gst.Device"
 status = "generate"
diff --git a/gstreamer/src/auto/device_monitor.rs b/gstreamer/src/auto/device_monitor.rs
index e842d3a70..1551a5322 100644
--- a/gstreamer/src/auto/device_monitor.rs
+++ b/gstreamer/src/auto/device_monitor.rs
@@ -62,7 +62,7 @@ pub trait DeviceMonitorExt {
 
     fn set_show_all_devices(&self, show_all: bool);
 
-    fn start(&self) -> bool;
+    fn start(&self) -> Result<(), glib::error::BoolError>;
 
     fn stop(&self);
 
@@ -120,9 +120,9 @@ impl<O: IsA<DeviceMonitor> + IsA<glib::object::Object>> DeviceMonitorExt for O {
         }
     }
 
-    fn start(&self) -> bool {
+    fn start(&self) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::gst_device_monitor_start(self.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::gst_device_monitor_start(self.to_glib_none().0), "Failed to start")
         }
     }
 
diff --git a/gstreamer/src/auto/device_provider.rs b/gstreamer/src/auto/device_provider.rs
index fc957509c..9988bba0f 100644
--- a/gstreamer/src/auto/device_provider.rs
+++ b/gstreamer/src/auto/device_provider.rs
@@ -60,7 +60,7 @@ pub trait DeviceProviderExt {
 
     fn hide_provider(&self, name: &str);
 
-    fn start(&self) -> bool;
+    fn start(&self) -> Result<(), glib::error::BoolError>;
 
     fn stop(&self);
 
@@ -120,9 +120,9 @@ impl<O: IsA<DeviceProvider> + IsA<glib::object::Object>> DeviceProviderExt for O
         }
     }
 
-    fn start(&self) -> bool {
+    fn start(&self) -> Result<(), glib::error::BoolError> {
         unsafe {
-            from_glib(ffi::gst_device_provider_start(self.to_glib_none().0))
+            glib::error::BoolError::from_glib(ffi::gst_device_provider_start(self.to_glib_none().0), "Failed to start")
         }
     }