diff --git a/lib/flatpak-ref.c b/lib/flatpak-ref.c
index 321906c5..167149e8 100644
--- a/lib/flatpak-ref.c
+++ b/lib/flatpak-ref.c
@@ -54,6 +54,7 @@ struct _FlatpakRefPrivate
   char          *branch;
   char          *commit;
   FlatpakRefKind kind;
+  char          *collection_id;
 };
 
 G_DEFINE_TYPE_WITH_PRIVATE (FlatpakRef, flatpak_ref, G_TYPE_OBJECT)
@@ -65,7 +66,8 @@ enum {
   PROP_ARCH,
   PROP_BRANCH,
   PROP_COMMIT,
-  PROP_KIND
+  PROP_KIND,
+  PROP_COLLECTION_ID,
 };
 
 static void
@@ -117,6 +119,11 @@ flatpak_ref_set_property (GObject      *object,
       priv->kind = g_value_get_enum (value);
       break;
 
+    case PROP_COLLECTION_ID:
+      g_clear_pointer (&priv->collection_id, g_free);
+      priv->collection_id = g_value_dup_string (value);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -154,6 +161,10 @@ flatpak_ref_get_property (GObject    *object,
       g_value_set_enum (value, priv->kind);
       break;
 
+    case PROP_COLLECTION_ID:
+      g_value_set_string (value, priv->collection_id);
+      break;
+
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
       break;
@@ -205,6 +216,16 @@ flatpak_ref_class_init (FlatpakRefClass *klass)
                                                       FLATPAK_TYPE_REF_KIND,
                                                       FLATPAK_REF_KIND_APP,
                                                       G_PARAM_READWRITE));
+
+#ifdef FLATPAK_ENABLE_P2P
+  g_object_class_install_property (object_class,
+                                   PROP_COLLECTION_ID,
+                                   g_param_spec_string ("collection-id",
+                                                        "Collection ID",
+                                                        "The collection ID",
+                                                        NULL,
+                                                        G_PARAM_READWRITE));
+#endif  /* FLATPAK_ENABLE_P2P */
 }
 
 static void
@@ -361,3 +382,21 @@ flatpak_ref_parse (const char *ref, GError **error)
                                     "branch", parts[3],
                                     NULL));
 }
+
+#ifdef FLATPAK_ENABLE_P2P
+/**
+ * flatpak_ref_get_collection_id:
+ * @self: a #FlatpakRef
+ *
+ * Gets the collection ID of the ref.
+ *
+ * Returns: (transfer none): the collection ID
+ */
+const char *
+flatpak_ref_get_collection_id (FlatpakRef *self)
+{
+  FlatpakRefPrivate *priv = flatpak_ref_get_instance_private (self);
+
+  return priv->collection_id;
+}
+#endif  /* FLATPAK_ENABLE_P2P */
diff --git a/lib/flatpak-ref.h b/lib/flatpak-ref.h
index e8e6b88d..f4493d28 100644
--- a/lib/flatpak-ref.h
+++ b/lib/flatpak-ref.h
@@ -71,4 +71,8 @@ FLATPAK_EXTERN char *        flatpak_ref_format_ref (FlatpakRef *self);
 FLATPAK_EXTERN FlatpakRef *   flatpak_ref_parse (const char *ref,
                                                  GError    **error);
 
+#ifdef FLATPAK_ENABLE_P2P
+FLATPAK_EXTERN const char *   flatpak_ref_get_collection_id (FlatpakRef *self);
+#endif  /* FLATPAK_ENABLE_P2P */
+
 #endif /* __FLATPAK_REF_H__ */
diff --git a/tests/testlibrary.c b/tests/testlibrary.c
index 55c658f4..e8df0280 100644
--- a/tests/testlibrary.c
+++ b/tests/testlibrary.c
@@ -202,6 +202,9 @@ test_ref (void)
   g_assert_cmpstr (flatpak_ref_get_name (ref), ==, "org.flatpak.Hello");
   g_assert_cmpstr (flatpak_ref_get_arch (ref), ==, "x86_64");
   g_assert_cmpstr (flatpak_ref_get_branch (ref), ==, "master");
+#ifdef FLATPAK_ENABLE_P2P
+  g_assert_null (flatpak_ref_get_collection_id (ref));
+#endif  /* FLATPAK_ENABLE_P2P */
 
   formatted = flatpak_ref_format_ref (ref);
   g_assert_cmpstr (formatted, ==, valid);
@@ -407,6 +410,9 @@ test_install_launch_uninstall (void)
   g_assert_cmpstr (flatpak_ref_get_arch (FLATPAK_REF (ref)), ==, flatpak_get_default_arch ());
   g_assert_cmpstr (flatpak_ref_get_branch (FLATPAK_REF (ref)), ==, "master");
   g_assert_cmpint (flatpak_ref_get_kind (FLATPAK_REF (ref)), ==, FLATPAK_REF_KIND_RUNTIME);
+#ifdef FLATPAK_ENABLE_P2P
+  g_assert_null (flatpak_ref_get_collection_id (FLATPAK_REF (ref)));
+#endif  /* FLATPAK_ENABLE_P2P */
 
   g_assert_cmpuint (flatpak_installed_ref_get_installed_size (ref), >, 0);
 
@@ -452,6 +458,9 @@ test_install_launch_uninstall (void)
   g_assert_cmpstr (flatpak_ref_get_arch (FLATPAK_REF (ref)), ==, flatpak_get_default_arch ());
   g_assert_cmpstr (flatpak_ref_get_branch (FLATPAK_REF (ref)), ==, "master");
   g_assert_cmpint (flatpak_ref_get_kind (FLATPAK_REF (ref)), ==, FLATPAK_REF_KIND_APP);
+#ifdef FLATPAK_ENABLE_P2P
+  g_assert_null (flatpak_ref_get_collection_id (FLATPAK_REF (ref)));
+#endif  /* FLATPAK_ENABLE_P2P */
 
   g_assert_cmpuint (flatpak_installed_ref_get_installed_size (ref), >, 0);
   g_assert_true (flatpak_installed_ref_get_is_current (ref));