diff --git a/runtime/doc/if_perl.txt b/runtime/doc/if_perl.txt
index 7be5f06..c73eb61 100644
--- a/runtime/doc/if_perl.txt
+++ b/runtime/doc/if_perl.txt
@@ -1,4 +1,4 @@
-*if_perl.txt*   For Vim version 7.4.  Last change: 2013 Oct 05
+*if_perl.txt*   For Vim version 7.4.  Last change: 2015 Oct 16
 
 
 		  VIM REFERENCE MANUAL    by Sven Verdoolaege
@@ -290,5 +290,13 @@
 Currently the name is "perl512.dll".  That is for Perl 5.12.  To know for
 sure edit "gvim.exe" and search for "perl\d*.dll\c".
 
+
+Unix ~
+
+The 'perldll' option can be used to specify the Perl shared library file
+instead of DYNAMIC_PERL_DLL file what was specified at compile time.  The
+version of the shared library must match the Perl version Vim was compiled
+with.
+
 ==============================================================================
  vim:tw=78:ts=8:ft=help:norl: