diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index 02763b58e6c6bc2cc5446855cb90b913f60f42f8..a5e03c6fc993aa62969cb2f527d07f0411f395d2 100644
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -351,7 +351,7 @@
bigint>
8 bytes
large-range integer
- -9223372036854775808 to 9223372036854775807
+ -9223372036854775808 to +9223372036854775807