diff --git a/src/dbus_fast/unpack.pxd b/src/dbus_fast/unpack.pxd
index 7ab46702..5fa9e8dc 100644
--- a/src/dbus_fast/unpack.pxd
+++ b/src/dbus_fast/unpack.pxd
@@ -3,6 +3,8 @@
 import cython
 
 
+cdef object Variant
+
 cpdef unpack_variants(object data)
 
 cdef _unpack_variants(object data)