diff --git a/lib/symbols/sp-kernel-symbol-resolver.c b/lib/symbols/sp-kernel-symbol-resolver.c
index cfea051b..3cef2111 100644
--- a/lib/symbols/sp-kernel-symbol-resolver.c
+++ b/lib/symbols/sp-kernel-symbol-resolver.c
@@ -24,28 +24,8 @@ struct _SpKernelSymbolResolver
   GObject parent_instance;
 };
 
-static void symbol_resolver_iface_init (SpSymbolResolverInterface *iface);
-
-G_DEFINE_TYPE_EXTENDED (SpKernelSymbolResolver,
-                        sp_kernel_symbol_resolver,
-                        G_TYPE_OBJECT,
-                        0,
-                        G_IMPLEMENT_INTERFACE (SP_TYPE_SYMBOL_RESOLVER,
-                                               symbol_resolver_iface_init))
-
 static GQuark linux_quark;
 
-static void
-sp_kernel_symbol_resolver_class_init (SpKernelSymbolResolverClass *klass)
-{
-  linux_quark = g_quark_from_static_string ("Linux");
-}
-
-static void
-sp_kernel_symbol_resolver_init (SpKernelSymbolResolver *skernel)
-{
-}
-
 static gchar *
 sp_kernel_symbol_resolver_resolve (SpSymbolResolver *resolver,
                                    guint64           time,
@@ -72,6 +52,23 @@ symbol_resolver_iface_init (SpSymbolResolverInterface *iface)
   iface->resolve = sp_kernel_symbol_resolver_resolve;
 }
 
+G_DEFINE_TYPE_WITH_CODE (SpKernelSymbolResolver,
+                         sp_kernel_symbol_resolver,
+                         G_TYPE_OBJECT,
+                         G_IMPLEMENT_INTERFACE (SP_TYPE_SYMBOL_RESOLVER,
+                                                symbol_resolver_iface_init))
+
+static void
+sp_kernel_symbol_resolver_class_init (SpKernelSymbolResolverClass *klass)
+{
+  linux_quark = g_quark_from_static_string ("Linux");
+}
+
+static void
+sp_kernel_symbol_resolver_init (SpKernelSymbolResolver *skernel)
+{
+}
+
 SpSymbolResolver *
 sp_kernel_symbol_resolver_new (void)
 {