diff --git a/contrib/ltree/_ltree_gist.c b/contrib/ltree/_ltree_gist.c
index 15c4cc022d7..4c0e7c25c0f 100644
--- a/contrib/ltree/_ltree_gist.c
+++ b/contrib/ltree/_ltree_gist.c
@@ -1,5 +1,5 @@
 /*
- * $PostgreSQL: pgsql/contrib/ltree/_ltree_gist.c,v 1.26 2009/06/11 14:48:51 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/ltree/_ltree_gist.c,v 1.27 2010/02/24 18:02:24 tgl Exp $
  *
  *
  * GiST support for ltree[]
@@ -88,7 +88,7 @@ _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")));
@@ -534,7 +534,7 @@ _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 f9e90e978dd..02c96c05d4c 100644
--- a/contrib/ltree/_ltree_op.c
+++ b/contrib/ltree/_ltree_op.c
@@ -1,5 +1,5 @@
 /*
- * $PostgreSQL: pgsql/contrib/ltree/_ltree_op.c,v 1.13 2009/06/11 14:48:51 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/ltree/_ltree_op.c,v 1.14 2010/02/24 18:02:24 tgl Exp $
  *
  *
  * op function for ltree[]
@@ -48,7 +48,7 @@ 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")));
@@ -148,7 +148,7 @@ _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")));
@@ -306,7 +306,7 @@ _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 df4f0794f2b..1059417e771 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 1.14 2009/06/11 14:48:51 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/ltree/lquery_op.c,v 1.15 2010/02/24 18:02:24 tgl Exp $
  */
 #include "postgres.h"
 
@@ -344,7 +344,7 @@ 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 d48ca8e1d4e..46fccb1ee1b 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 1.25 2009/06/11 14:48:51 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/ltree/ltree_gist.c,v 1.26 2010/02/24 18:02:24 tgl Exp $
  */
 #include "postgres.h"
 
@@ -602,7 +602,7 @@ 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")));