diff --git a/pkgs/development/interpreters/tcl/default.nix b/pkgs/development/interpreters/tcl/default.nix
index 0fce5d3236a..1401757c267 100644
--- a/pkgs/development/interpreters/tcl/default.nix
+++ b/pkgs/development/interpreters/tcl/default.nix
@@ -1,10 +1,10 @@
 {stdenv, fetchurl}:
 
 stdenv.mkDerivation {
-  name = "tcl-8.4.13";
+  name = "tcl-8.4.16";
   builder = ./builder.sh;
   src = fetchurl {
-    url = mirror://sourceforge/tcl/tcl8.4.13-src.tar.gz;
-    md5 = "c6b655ad5db095ee73227113220c0523";
+    url = mirror://sourceforge/tcl/tcl8.4.16-src.tar.gz;
+    sha256 = "0v9mh53kdvfm4kxgsw8gfxsfl8kvbnnp22bpwyyg5sa4jyjjbs93";
   };
 }