diff --git a/doc/src/sgml/ref/copy.sgml b/doc/src/sgml/ref/copy.sgml
index 5d3bf59067..0140ea28ae 100644
--- a/doc/src/sgml/ref/copy.sgml
+++ b/doc/src/sgml/ref/copy.sgml
@@ -1,5 +1,5 @@
@@ -171,7 +171,7 @@ COPY { tablename [ ( delimiter
- The single character that separates columns within each row
+ The single ASCII character that separates columns within each row
(line) of the file. The default is a tab character in text mode,
a comma in CSV> mode.