diff --git a/contrib/tablefunc/tablefunc.c b/contrib/tablefunc/tablefunc.c
index b24c70d538..69b276b285 100644
--- a/contrib/tablefunc/tablefunc.c
+++ b/contrib/tablefunc/tablefunc.c
@@ -306,10 +306,10 @@ rand_array_internal(FunctionCallInfo fcinfo, Oid datatype)
 				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 				 errmsg("number of rows cannot be negative")));
 
-	if (minlen >= maxlen)
+	if (minlen > maxlen)
 		ereport(ERROR,
 				(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
-				 errmsg("minlen must be smaller than maxlen.")));
+				 errmsg("minlen must be less than or equal to maxlen.")));
 
 	if (minlen < 0)
 		ereport(ERROR,