diff --git a/gio/gfilterinputstream.c b/gio/gfilterinputstream.c
index ec8472c4e..c39076c36 100644
--- a/gio/gfilterinputstream.c
+++ b/gio/gfilterinputstream.c
@@ -113,7 +113,7 @@ g_filter_input_stream_class_init (GFilterInputStreamClass *klass)
                                    g_param_spec_boolean ("close-base-stream",
                                                          P_("Close Base Stream"),
                                                          P_("If the base stream should be closed when the filter stream is closed."),
-                                                         TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY | 
+                                                         TRUE, G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
                                                          G_PARAM_STATIC_NAME|G_PARAM_STATIC_NICK|G_PARAM_STATIC_BLURB));
 }