diff --git a/contrib/ltree/_ltree_gist.c b/contrib/ltree/_ltree_gist.c
index 34ec2552ca4..3a0e7769fff 100644
--- a/contrib/ltree/_ltree_gist.c
+++ b/contrib/ltree/_ltree_gist.c
@@ -84,7 +84,7 @@ _ltree_compress(PG_FUNCTION_ARGS)
 		int			num = ArrayGetNItems(ARR_NDIM(val), ARR_DIMS(val));
 		ltree	   *item = (ltree *) ARR_DATA_PTR(val);
 
-		if (ARR_NDIM(val) != 1)
+		if (ARR_NDIM(val) > 1)
 			ereport(ERROR,
 					(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 					 errmsg("array must be one-dimensional")));
@@ -530,7 +530,7 @@ _arrq_cons(ltree_gist * key, ArrayType *_query)
 	lquery	   *query = (lquery *) ARR_DATA_PTR(_query);
 	int			num = ArrayGetNItems(ARR_NDIM(_query), ARR_DIMS(_query));
 
-	if (ARR_NDIM(_query) != 1)
+	if (ARR_NDIM(_query) > 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 				 errmsg("array must be one-dimensional")));
diff --git a/contrib/ltree/_ltree_op.c b/contrib/ltree/_ltree_op.c
index f93d2bb8889..de5cb90a51e 100644
--- a/contrib/ltree/_ltree_op.c
+++ b/contrib/ltree/_ltree_op.c
@@ -43,7 +43,7 @@ array_iterator(ArrayType *la, PGCALL2 callback, void *param, ltree ** found)
 	int			num = ArrayGetNItems(ARR_NDIM(la), ARR_DIMS(la));
 	ltree	   *item = (ltree *) ARR_DATA_PTR(la);
 
-	if (ARR_NDIM(la) != 1)
+	if (ARR_NDIM(la) > 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 				 errmsg("array must be one-dimensional")));
@@ -143,7 +143,7 @@ _lt_q_regex(PG_FUNCTION_ARGS)
 	bool		res = false;
 	int			num = ArrayGetNItems(ARR_NDIM(_query), ARR_DIMS(_query));
 
-	if (ARR_NDIM(_query) != 1)
+	if (ARR_NDIM(_query) > 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 				 errmsg("array must be one-dimensional")));
@@ -301,7 +301,7 @@ _lca(PG_FUNCTION_ARGS)
 	ltree	  **a,
 			   *res;
 
-	if (ARR_NDIM(la) != 1)
+	if (ARR_NDIM(la) > 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 				 errmsg("array must be one-dimensional")));
diff --git a/contrib/ltree/lquery_op.c b/contrib/ltree/lquery_op.c
index 8522c5e0538..c0f4309b78b 100644
--- a/contrib/ltree/lquery_op.c
+++ b/contrib/ltree/lquery_op.c
@@ -1,7 +1,7 @@
 /*
  * op function for ltree and lquery
  * Teodor Sigaev <teodor@stack.net>
- * $PostgreSQL: pgsql/contrib/ltree/lquery_op.c,v 1.11 2006/10/04 00:29:45 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/ltree/lquery_op.c,v 1.11.4.1 2010/02/24 18:02:36 tgl Exp $
  */
 
 #include "ltree.h"
@@ -325,7 +325,7 @@ lt_q_regex(PG_FUNCTION_ARGS)
 	bool		res = false;
 	int			num = ArrayGetNItems(ARR_NDIM(_query), ARR_DIMS(_query));
 
-	if (ARR_NDIM(_query) != 1)
+	if (ARR_NDIM(_query) > 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 				 errmsg("array must be one-dimensional")));
diff --git a/contrib/ltree/ltree_gist.c b/contrib/ltree/ltree_gist.c
index dea0b9c3863..921643d2129 100644
--- a/contrib/ltree/ltree_gist.c
+++ b/contrib/ltree/ltree_gist.c
@@ -1,7 +1,7 @@
 /*
  * GiST support for ltree
  * Teodor Sigaev <teodor@stack.net>
- * $PostgreSQL: pgsql/contrib/ltree/ltree_gist.c,v 1.22 2007/11/16 01:12:24 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/ltree/ltree_gist.c,v 1.22.2.1 2010/02/24 18:02:36 tgl Exp $
  */
 
 #include "ltree.h"
@@ -601,7 +601,7 @@ arrq_cons(ltree_gist * key, ArrayType *_query)
 	lquery	   *query = (lquery *) ARR_DATA_PTR(_query);
 	int			num = ArrayGetNItems(ARR_NDIM(_query), ARR_DIMS(_query));
 
-	if (ARR_NDIM(_query) != 1)
+	if (ARR_NDIM(_query) > 1)
 		ereport(ERROR,
 				(errcode(ERRCODE_ARRAY_SUBSCRIPT_ERROR),
 				 errmsg("array must be one-dimensional")));