diff --git a/doc/src/sgml/seg.sgml b/doc/src/sgml/seg.sgml
index 2e879c3e452..f3dd76c3c08 100644
--- a/doc/src/sgml/seg.sgml
+++ b/doc/src/sgml/seg.sgml
@@ -225,12 +225,12 @@ test=> SELECT '6.25 .. 6.50'::seg AS "pH";
 
   <para>
    <type>seg</type> values are stored internally as pairs of 32-bit floating point
-   numbers. This means that numbers with more than 7 significant digits
+   numbers. This means that numbers with more than 6 significant digits
    will be truncated.
   </para>
 
   <para>
-   Numbers with 7 or fewer significant digits retain their
+   Numbers with 6 or fewer significant digits retain their
    original precision. That is, if your query returns 0.00, you will be
    sure that the trailing zeroes are not the artifacts of formatting: they
    reflect the precision of the original data. The number of leading