diff --git a/src/backend/utils/adt/pseudotypes.c b/src/backend/utils/adt/pseudotypes.c
index c8202502c9..cc4e63bf5f 100644
--- a/src/backend/utils/adt/pseudotypes.c
+++ b/src/backend/utils/adt/pseudotypes.c
@@ -228,6 +228,19 @@ anycompatiblerange_out(PG_FUNCTION_ARGS)
 	return range_out(fcinfo);
 }
 
+/*
+ * anymultirange
+ *
+ * We may as well allow output, since multirange_out will in fact work.
+ */
+PSEUDOTYPE_DUMMY_INPUT_FUNC(anymultirange);
+
+Datum
+anymultirange_out(PG_FUNCTION_ARGS)
+{
+	return multirange_out(fcinfo);
+}
+
 /*
  * anycompatiblemultirange
  *
@@ -241,30 +254,6 @@ anycompatiblemultirange_out(PG_FUNCTION_ARGS)
 	return multirange_out(fcinfo);
 }
 
-/*
- * anymultirange_in		- input routine for pseudo-type ANYMULTIRANGE.
- */
-Datum
-anymultirange_in(PG_FUNCTION_ARGS)
-{
-	ereport(ERROR,
-			(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
-			 errmsg("cannot accept a value of type %s", "anymultirange")));
-
-	PG_RETURN_VOID();			/* keep compiler quiet */
-}
-
-/*
- * anymultirange_out		- output routine for pseudo-type ANYMULTIRANGE.
- *
- * We may as well allow this, since multirange_out will in fact work.
- */
-Datum
-anymultirange_out(PG_FUNCTION_ARGS)
-{
-	return multirange_out(fcinfo);
-}
-
 /*
  * void
  *