diff --git a/common/xdg-app-portal-error.c b/common/xdg-app-portal-error.c
index dfe89030..2df75d0c 100644
--- a/common/xdg-app-portal-error.c
+++ b/common/xdg-app-portal-error.c
@@ -40,7 +40,7 @@ xdg_app_error_quark (void)
 {
   static volatile gsize quark_volatile = 0;
 
-  g_dbus_error_register_error_domain ("xdg-app--error-quark",
+  g_dbus_error_register_error_domain ("xdg-app-portal-error-quark",
                                       &quark_volatile,
                                       xdg_app_error_entries,
                                       G_N_ELEMENTS (xdg_app_error_entries));
diff --git a/lib/Makefile.am.inc b/lib/Makefile.am.inc
index 071fdcdf..ba255444 100644
--- a/lib/Makefile.am.inc
+++ b/lib/Makefile.am.inc
@@ -5,6 +5,7 @@ noinst_PROGRAMS += test-libxdg-app
 public_headers = \
 	lib/xdg-app.h \
 	lib/xdg-app-ref.h \
+	lib/xdg-app-error.h \
 	lib/xdg-app-installed-ref.h \
 	lib/xdg-app-remote-ref.h \
 	lib/xdg-app-installation.h \
@@ -47,6 +48,7 @@ sources = \
 	lib/xdg-app-remote-ref.c \
 	lib/xdg-app-remote-private.h \
 	lib/xdg-app-remote.c \
+	lib/xdg-app-error.c \
 	lib/xdg-app-installation.c \
 	$(NULL)
 
diff --git a/lib/xdg-app-enum-types.c.template b/lib/xdg-app-enum-types.c.template
index c9e79c0b..dac75643 100644
--- a/lib/xdg-app-enum-types.c.template
+++ b/lib/xdg-app-enum-types.c.template
@@ -1,7 +1,7 @@
 /*** BEGIN file-header ***/
 #include "config.h"
 #include <xdg-app-utils.h>
-#include <xdg-app-ref.h>
+#include <xdg-app.h>
 #include <xdg-app-enum-types.h>
 #include <gio/gio.h>
 
diff --git a/lib/xdg-app-error.c b/lib/xdg-app-error.c
new file mode 100644
index 00000000..f40664ab
--- /dev/null
+++ b/lib/xdg-app-error.c
@@ -0,0 +1,28 @@
+/* xdg-app-error.c
+ *
+ * Copyright (C) 2015 Red Hat, Inc
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *       Alexander Larsson <alexl@redhat.com>
+ */
+
+#include "config.h"
+
+#include "xdg-app-portal-error.h"
+
+#include <gio/gio.h>
+
+G_DEFINE_QUARK (xdg-app-error-quark, g_io_error)
diff --git a/lib/xdg-app-error.h b/lib/xdg-app-error.h
new file mode 100644
index 00000000..0aebfb03
--- /dev/null
+++ b/lib/xdg-app-error.h
@@ -0,0 +1,43 @@
+/* xdg-app-error.c
+ *
+ * Copyright (C) 2015 Red Hat, Inc
+ *
+ * This file is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *       Alexander Larsson <alexl@redhat.com>
+ */
+
+#ifndef XDG_APP_ERROR_H
+#define XDG_APP_ERROR_H
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+/**
+ * XdpErrorEnum:
+ */
+typedef enum {
+  XDG_APP_ERROR_ALREADY_INSTALLED,
+  XDG_APP_ERROR_NOT_INSTALLED,
+} XdgAppError;
+
+#define XDG_APP_ERROR xdg_app_error_quark()
+
+GQuark  xdg_app_error_quark      (void);
+
+G_END_DECLS
+
+#endif /* XDG_APP_ERROR_H */
diff --git a/lib/xdg-app.h b/lib/xdg-app.h
index c039617d..9546f202 100644
--- a/lib/xdg-app.h
+++ b/lib/xdg-app.h
@@ -27,6 +27,7 @@
 
 #include <xdg-app-version-macros.h>
 #include <xdg-app-enum-types.h>
+#include <xdg-app-error.h>
 #include <xdg-app-ref.h>
 #include <xdg-app-installed-ref.h>
 #include <xdg-app-remote-ref.h>