diff --git a/reference/pgsql/functions/pg-fetch-array.xml b/reference/pgsql/functions/pg-fetch-array.xml
index e314c7d292..c08299b62c 100644
--- a/reference/pgsql/functions/pg-fetch-array.xml
+++ b/reference/pgsql/functions/pg-fetch-array.xml
@@ -52,8 +52,8 @@
      <term><parameter>row</parameter></term>
      <listitem>
       <para>
-       Row number in result to fetch.  Rows are numbered from 0 upwards.  If omitted,
-       next row is fetched.
+       Row number in result to fetch. Rows are numbered from 0 upwards. If
+       omitted or &null;, the next row is fetched.
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/pgsql/functions/pg-fetch-assoc.xml b/reference/pgsql/functions/pg-fetch-assoc.xml
index 143c0aafdf..42c65b7736 100644
--- a/reference/pgsql/functions/pg-fetch-assoc.xml
+++ b/reference/pgsql/functions/pg-fetch-assoc.xml
@@ -51,8 +51,8 @@
      <term><parameter>row</parameter></term>
      <listitem>
       <para>
-       Row number in result to fetch.  Rows are numbered from 0 upwards.  If omitted,
-       next row is fetched.
+       Row number in result to fetch. Rows are numbered from 0 upwards. If
+       omitted or &null;, the next row is fetched.
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/pgsql/functions/pg-fetch-object.xml b/reference/pgsql/functions/pg-fetch-object.xml
index a47af8e14f..4454127023 100644
--- a/reference/pgsql/functions/pg-fetch-object.xml
+++ b/reference/pgsql/functions/pg-fetch-object.xml
@@ -55,8 +55,8 @@
      <term><parameter>row</parameter></term>
      <listitem>
       <para>
-       Row number in result to fetch.  Rows are numbered from 0 upwards.  If omitted,
-       next row is fetched.
+       Row number in result to fetch. Rows are numbered from 0 upwards. If
+       omitted or &null;, the next row is fetched.
       </para>
      </listitem>
     </varlistentry>
diff --git a/reference/pgsql/functions/pg-fetch-row.xml b/reference/pgsql/functions/pg-fetch-row.xml
index 946ea4d938..18198b2c18 100644
--- a/reference/pgsql/functions/pg-fetch-row.xml
+++ b/reference/pgsql/functions/pg-fetch-row.xml
@@ -41,8 +41,8 @@
      <term><parameter>row</parameter></term>
      <listitem>
       <para>
-       Row number in result to fetch.  Rows are numbered from 0 upwards.  If omitted,
-       next row is fetched.
+       Row number in result to fetch. Rows are numbered from 0 upwards. If
+       omitted or &null;, the next row is fetched.
       </para>
      </listitem>
     </varlistentry>