diff --git a/runtime/doc/if_tcl.txt b/runtime/doc/if_tcl.txt
index bc9d3b8..4d02233 100644
--- a/runtime/doc/if_tcl.txt
+++ b/runtime/doc/if_tcl.txt
@@ -515,12 +515,15 @@
 ==============================================================================
 9. Dynamic loading					*tcl-dynamic*
 
-On MS-Windows the Tcl library can be loaded dynamically.  The |:version|
-output then includes |+tcl/dyn|.
+On MS-Windows and Unix the Tcl library can be loaded dynamically.  The
+|:version| output then includes |+tcl/dyn|.
 
-This means that Vim will search for the Tcl DLL file only when needed.  When
-you don't use the Tcl interface you don't need it, thus you can use Vim
-without this DLL file.
+This means that Vim will search for the Tcl DLL or shared library file only
+when needed.  When you don't use the Tcl interface you don't need it, thus you
+can use Vim without this file.
+
+
+MS-Windows ~
 
 To use the Tcl interface the Tcl DLL must be in your search path.  In a
 console window type "path" to see what directories are used.
@@ -529,5 +532,12 @@
 Currently the name is "tcl86.dll".  That is for Tcl 8.6.  To know for sure
 edit "gvim.exe" and search for "tcl\d*.dll\c".
 
+
+Unix ~
+
+The 'tcldll' option can be used to specify the Tcl shared library file instead
+of DYNAMIC_TCL_DLL file what was specified at compile time.  The version of
+the shared library must match the Tcl version Vim was compiled with.
+
 ==============================================================================
  vim:tw=78:ts=8:ft=help:norl:
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index a17cf71..8cf2aa7 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -7437,6 +7437,17 @@
 	Resetting this option is useful when using a ":tag" command in a
 	mapping which should not change the tagstack.
 
+						*'tcldll'*
+'tcldll' 		string	(default depends on the build)
+			global
+			{not in Vi}
+			{only available when compiled with the |+tcl/dyn|
+			feature}
+	Specifies the name of the Tcl shared library. The default is
+	DYNAMIC_TCL_DLL, which was specified at compile time.
+	This option cannot be set from a |modeline| or in the |sandbox|, for
+	security reasons.
+
 						*'term'* *E529* *E530* *E531*
 'term'			string	(default is $TERM, if that fails:
 				      in the GUI: "builtin_gui"
diff --git a/runtime/doc/quickref.txt b/runtime/doc/quickref.txt
index fb10ccc..8450cdd 100644
--- a/runtime/doc/quickref.txt
+++ b/runtime/doc/quickref.txt
@@ -909,6 +909,7 @@
 'tagrelative'	  'tr'	    file names in tag file are relative
 'tags'		  'tag'     list of file names used by the tag command
 'tagstack'	  'tgst'    push tags onto the tag stack
+'tcldll'		    name of the Tcl dynamic library
 'term'			    name of the terminal
 'termbidi'	  'tbidi'   terminal takes care of bi-directionality
 'termencoding'	  'tenc'    character encoding used by the terminal
diff --git a/runtime/optwin.vim b/runtime/optwin.vim
index 7318483..314e7f3 100644
--- a/runtime/optwin.vim
+++ b/runtime/optwin.vim
@@ -1331,6 +1331,10 @@
   call append("$", "rubydll\tname of the Ruby dynamic library")
   call <SID>OptionG("rubydll", &rubydll)
 endif
+if exists("&tcldll")
+  call append("$", "tcldll\tname of the Tcl dynamic library")
+  call <SID>OptionG("tcldll", &tcldll)
+endif
 
 set cpo&vim