diff --git a/doc/src/sgml/install-windows.sgml b/doc/src/sgml/install-windows.sgml
index 72a700fdcc8..3c9d90ef338 100644
--- a/doc/src/sgml/install-windows.sgml
+++ b/doc/src/sgml/install-windows.sgml
@@ -201,7 +201,18 @@ $ENV{PATH}=$ENV{PATH} . ';c:\some\where\bison\bin';
       Bison can be downloaded from <ulink url="http://gnuwin32.sourceforge.net"></>.
       Flex can be downloaded from
       <ulink url="http://www.postgresql.org/ftp/misc/winflex/"></>.
-     </para></listitem>
+     </para>
+
+     <note>
+      <para>
+        The Bison distribution from GnuWin32 appears to have a bug that
+        causes Bison to malfunction when installed in a directory with
+        spaces in the name, such as the default location on English
+        installations <filename>C:\Program Files\GnuWin32</filename>.
+        Consider installing into <filename>C:\GnuWin32</filename> instead.
+       </para>
+     </note>
+     </listitem>
     </varlistentry>
 
     <varlistentry>