diff --git a/src/libsysprof-analyze/sysprof-document.c b/src/libsysprof-analyze/sysprof-document.c
index aab61967..b236d0d6 100644
--- a/src/libsysprof-analyze/sysprof-document.c
+++ b/src/libsysprof-analyze/sysprof-document.c
@@ -1492,12 +1492,12 @@ sysprof_document_catalog_marks (SysprofDocument *self)
       while (g_hash_table_iter_next (&name_iter, (gpointer *)&name, (gpointer *)&marks))
         {
           g_autoptr(GListModel) model = _sysprof_document_bitset_index_new (G_LIST_MODEL (self), marks);
-          g_autoptr(SysprofMarkCatalog) names_catalog = _sysprof_mark_catalog_new (name, model);
+          g_autoptr(SysprofMarkCatalog) names_catalog = _sysprof_mark_catalog_new (name, model, SYSPROF_MARK_CATALOG_KIND_NAME);
 
           g_list_store_append (names_store, names_catalog);
         }
 
-      group = _sysprof_mark_catalog_new (group_name, G_LIST_MODEL (names_store));
+      group = _sysprof_mark_catalog_new (group_name, G_LIST_MODEL (names_store), SYSPROF_MARK_CATALOG_KIND_GROUP);
 
       g_list_store_append (store, group);
     }
diff --git a/src/libsysprof-analyze/sysprof-mark-catalog-private.h b/src/libsysprof-analyze/sysprof-mark-catalog-private.h
index de86f1c7..94089d4e 100644
--- a/src/libsysprof-analyze/sysprof-mark-catalog-private.h
+++ b/src/libsysprof-analyze/sysprof-mark-catalog-private.h
@@ -26,7 +26,8 @@
 
 G_BEGIN_DECLS
 
-SysprofMarkCatalog *_sysprof_mark_catalog_new (const char *name,
-                                               GListModel *items);
+SysprofMarkCatalog *_sysprof_mark_catalog_new (const char             *name,
+                                               GListModel             *items,
+                                               SysprofMarkCatalogKind  kind);
 
 G_END_DECLS
diff --git a/src/libsysprof-analyze/sysprof-mark-catalog.c b/src/libsysprof-analyze/sysprof-mark-catalog.c
index dd7c83e7..8f8615b8 100644
--- a/src/libsysprof-analyze/sysprof-mark-catalog.c
+++ b/src/libsysprof-analyze/sysprof-mark-catalog.c
@@ -27,11 +27,13 @@ struct _SysprofMarkCatalog
   GObject parent_instance;
   GListModel *items;
   char *name;
+  SysprofMarkCatalogKind kind : 1;
 } SysprofMarkCatalogPrivate;
 
 enum {
   PROP_0,
   PROP_NAME,
+  PROP_KIND,
   N_PROPS
 };
 
@@ -88,6 +90,10 @@ sysprof_mark_catalog_get_property (GObject    *object,
 
   switch (prop_id)
     {
+    case PROP_KIND:
+      g_value_set_enum (value, sysprof_mark_catalog_get_kind (self));
+      break;
+
     case PROP_NAME:
       g_value_set_string (value, sysprof_mark_catalog_get_name (self));
       break;
@@ -105,6 +111,12 @@ sysprof_mark_catalog_class_init (SysprofMarkCatalogClass *klass)
   object_class->dispose = sysprof_mark_catalog_dispose;
   object_class->get_property = sysprof_mark_catalog_get_property;
 
+  properties[PROP_KIND] =
+    g_param_spec_enum ("kind", NULL, NULL,
+                       SYSPROF_TYPE_MARK_CATALOG_KIND,
+                       SYSPROF_MARK_CATALOG_KIND_GROUP,
+                       (G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
   properties[PROP_NAME] =
     g_param_spec_string ("name", NULL, NULL,
                          NULL,
@@ -127,8 +139,9 @@ sysprof_mark_catalog_get_name (SysprofMarkCatalog *self)
 }
 
 SysprofMarkCatalog *
-_sysprof_mark_catalog_new (const char *name,
-                           GListModel *items)
+_sysprof_mark_catalog_new (const char             *name,
+                           GListModel             *items,
+                           SysprofMarkCatalogKind  kind)
 {
   SysprofMarkCatalog *self;
 
@@ -138,6 +151,19 @@ _sysprof_mark_catalog_new (const char *name,
   self = g_object_new (SYSPROF_TYPE_MARK_CATALOG, NULL);
   self->name = g_strdup (name);
   self->items = g_object_ref (items);
+  self->kind = kind;
 
   return self;
 }
+
+SysprofMarkCatalogKind
+sysprof_mark_catalog_get_kind (SysprofMarkCatalog *self)
+{
+  g_return_val_if_fail (SYSPROF_IS_MARK_CATALOG (self), 0);
+
+  return self->kind;
+}
+
+G_DEFINE_ENUM_TYPE (SysprofMarkCatalogKind, sysprof_mark_catalog_kind,
+                    G_DEFINE_ENUM_VALUE (SYSPROF_MARK_CATALOG_KIND_GROUP, "group"),
+                    G_DEFINE_ENUM_VALUE (SYSPROF_MARK_CATALOG_KIND_NAME, "name"))
diff --git a/src/libsysprof-analyze/sysprof-mark-catalog.h b/src/libsysprof-analyze/sysprof-mark-catalog.h
index 9ed89093..33756481 100644
--- a/src/libsysprof-analyze/sysprof-mark-catalog.h
+++ b/src/libsysprof-analyze/sysprof-mark-catalog.h
@@ -27,11 +27,22 @@
 G_BEGIN_DECLS
 
 #define SYSPROF_TYPE_MARK_CATALOG (sysprof_mark_catalog_get_type())
+#define SYSPROF_TYPE_MARK_CATALOG_KIND (sysprof_mark_catalog_kind_get_type())
+
+typedef enum _SysprofMarkCatalogKind
+{
+  SYSPROF_MARK_CATALOG_KIND_GROUP,
+  SYSPROF_MARK_CATALOG_KIND_NAME,
+} SysprofMarkCatalogKind;
 
 SYSPROF_AVAILABLE_IN_ALL
 G_DECLARE_FINAL_TYPE (SysprofMarkCatalog, sysprof_mark_catalog, SYSPROF, MARK_CATALOG, GObject)
 
 SYSPROF_AVAILABLE_IN_ALL
-const char *sysprof_mark_catalog_get_name (SysprofMarkCatalog *self);
+GType                   sysprof_mark_catalog_kind_get_type (void) G_GNUC_CONST;
+SYSPROF_AVAILABLE_IN_ALL
+const char             *sysprof_mark_catalog_get_name      (SysprofMarkCatalog *self);
+SYSPROF_AVAILABLE_IN_ALL
+SysprofMarkCatalogKind  sysprof_mark_catalog_get_kind      (SysprofMarkCatalog *self);
 
 G_END_DECLS
diff --git a/src/libsysprof-analyze/tests/test-mark-catalog.c b/src/libsysprof-analyze/tests/test-mark-catalog.c
index ed57c2e4..74422e76 100644
--- a/src/libsysprof-analyze/tests/test-mark-catalog.c
+++ b/src/libsysprof-analyze/tests/test-mark-catalog.c
@@ -58,6 +58,7 @@ main (int   argc,
 
       g_assert (SYSPROF_IS_MARK_CATALOG (catalog));
       g_assert (G_IS_LIST_MODEL (catalog));
+      g_assert (sysprof_mark_catalog_get_kind (catalog) == SYSPROF_MARK_CATALOG_KIND_GROUP);
 
       g_print ("%s\n", group);
 
@@ -67,8 +68,9 @@ main (int   argc,
           const char *name = sysprof_mark_catalog_get_name (name_catalog);
           guint n_marks = g_list_model_get_n_items (G_LIST_MODEL (name_catalog));
 
-          g_assert (SYSPROF_IS_MARK_CATALOG (catalog));
-          g_assert (G_IS_LIST_MODEL (catalog));
+          g_assert (SYSPROF_IS_MARK_CATALOG (name_catalog));
+          g_assert (G_IS_LIST_MODEL (name_catalog));
+          g_assert (sysprof_mark_catalog_get_kind (name_catalog) == SYSPROF_MARK_CATALOG_KIND_NAME);
 
           g_print ("  %s\n", name);