diff --git a/docs/devel/qom.rst b/docs/devel/qom.rst
index c4857d95c8e..a47e1b9a239 100644
--- a/docs/devel/qom.rst
+++ b/docs/devel/qom.rst
@@ -284,28 +284,28 @@ in the header file:
 .. code-block:: c
    :caption: Declaring a simple type
 
-    OBJECT_DECLARE_SIMPLE_TYPE(MyDevice, my_device, MY_DEVICE, DEVICE)
+   OBJECT_DECLARE_SIMPLE_TYPE(MyDevice, my_device, MY_DEVICE, DEVICE)
 
 This is equivalent to the following:
 
 .. code-block:: c
    :caption: Expansion from declaring a simple type
 
-    typedef struct MyDevice MyDevice;
-    typedef struct MyDeviceClass MyDeviceClass;
+   typedef struct MyDevice MyDevice;
+   typedef struct MyDeviceClass MyDeviceClass;
 
-    G_DEFINE_AUTOPTR_CLEANUP_FUNC(MyDeviceClass, object_unref)
+   G_DEFINE_AUTOPTR_CLEANUP_FUNC(MyDeviceClass, object_unref)
 
-    #define MY_DEVICE_GET_CLASS(void *obj) \
-            OBJECT_GET_CLASS(MyDeviceClass, obj, TYPE_MY_DEVICE)
-    #define MY_DEVICE_CLASS(void *klass) \
-            OBJECT_CLASS_CHECK(MyDeviceClass, klass, TYPE_MY_DEVICE)
-    #define MY_DEVICE(void *obj)
-            OBJECT_CHECK(MyDevice, obj, TYPE_MY_DEVICE)
+   #define MY_DEVICE_GET_CLASS(void *obj) \
+           OBJECT_GET_CLASS(MyDeviceClass, obj, TYPE_MY_DEVICE)
+   #define MY_DEVICE_CLASS(void *klass) \
+           OBJECT_CLASS_CHECK(MyDeviceClass, klass, TYPE_MY_DEVICE)
+   #define MY_DEVICE(void *obj)
+           OBJECT_CHECK(MyDevice, obj, TYPE_MY_DEVICE)
 
-    struct MyDeviceClass {
-        DeviceClass parent_class;
-    };
+   struct MyDeviceClass {
+       DeviceClass parent_class;
+   };
 
 The 'struct MyDevice' needs to be declared separately.
 If the type requires virtual functions to be declared in the class
@@ -319,33 +319,33 @@ In the simple case the OBJECT_DEFINE_TYPE macro is suitable:
 .. code-block:: c
    :caption: Defining a simple type
 
-    OBJECT_DEFINE_TYPE(MyDevice, my_device, MY_DEVICE, DEVICE)
+   OBJECT_DEFINE_TYPE(MyDevice, my_device, MY_DEVICE, DEVICE)
 
 This is equivalent to the following:
 
 .. code-block:: c
    :caption: Expansion from defining a simple type
 
-    static void my_device_finalize(Object *obj);
-    static void my_device_class_init(ObjectClass *oc, void *data);
-    static void my_device_init(Object *obj);
-
-    static const TypeInfo my_device_info = {
-        .parent = TYPE_DEVICE,
-        .name = TYPE_MY_DEVICE,
-        .instance_size = sizeof(MyDevice),
-        .instance_init = my_device_init,
-        .instance_finalize = my_device_finalize,
-        .class_size = sizeof(MyDeviceClass),
-        .class_init = my_device_class_init,
-    };
-
-    static void
-    my_device_register_types(void)
-    {
-        type_register_static(&my_device_info);
-    }
-    type_init(my_device_register_types);
+   static void my_device_finalize(Object *obj);
+   static void my_device_class_init(ObjectClass *oc, void *data);
+   static void my_device_init(Object *obj);
+
+   static const TypeInfo my_device_info = {
+       .parent = TYPE_DEVICE,
+       .name = TYPE_MY_DEVICE,
+       .instance_size = sizeof(MyDevice),
+       .instance_init = my_device_init,
+       .instance_finalize = my_device_finalize,
+       .class_size = sizeof(MyDeviceClass),
+       .class_init = my_device_class_init,
+   };
+
+   static void
+   my_device_register_types(void)
+   {
+       type_register_static(&my_device_info);
+   }
+   type_init(my_device_register_types);
 
 This is sufficient to get the type registered with the type
 system, and the three standard methods now need to be implemented
@@ -358,9 +358,9 @@ This accepts an array of interface type names.
 .. code-block:: c
    :caption: Defining a simple type implementing interfaces
 
-    OBJECT_DEFINE_TYPE_WITH_INTERFACES(MyDevice, my_device,
-                                       MY_DEVICE, DEVICE,
-                                       { TYPE_USER_CREATABLE }, { NULL })
+   OBJECT_DEFINE_TYPE_WITH_INTERFACES(MyDevice, my_device,
+                                      MY_DEVICE, DEVICE,
+                                      { TYPE_USER_CREATABLE }, { NULL })
 
 If the type is not intended to be instantiated, then then
 the OBJECT_DEFINE_ABSTRACT_TYPE() macro can be used instead:
@@ -368,7 +368,7 @@ the OBJECT_DEFINE_ABSTRACT_TYPE() macro can be used instead:
 .. code-block:: c
    :caption: Defining a simple abstract type
 
-    OBJECT_DEFINE_ABSTRACT_TYPE(MyDevice, my_device, MY_DEVICE, DEVICE)
+   OBJECT_DEFINE_ABSTRACT_TYPE(MyDevice, my_device, MY_DEVICE, DEVICE)
 
 
 
