diff --git a/Makefile b/Makefile
index 21b89cf43ff590e8740d4a37fa5f5ca4492ef44a..dff5c2d9fc693c3b6c2e645d10cbb541241e50bb 100644
--- a/Makefile
+++ b/Makefile
@@ -35,3 +35,4 @@ test: all
 	@ [ -n "$$(which ruby)" ] && time -f "%C : %E seconds" ./prime.rb $(ROUNDS) > /dev/null
 	@ [ -n "$$(which node)" ] && time -f "%C : %E seconds" ./prime.js $(ROUNDS) > /dev/null
 	@ [ -x /usr/bin/awk ] && time -f "%C : %E seconds" ./prime.awk $(ROUNDS) > /dev/null
+	@ [ -n "$$(which tclsh)" ] && time -f "%C : %E seconds" ./prime.tcl $(ROUNDS) > /dev/null
diff --git a/README.rst b/README.rst
index 8f9b12fc0252bd3f0524e37a443a24357ffa567b..53056ada04550b10e4a793cd619258debeab10a5 100644
--- a/README.rst
+++ b/README.rst
@@ -16,6 +16,7 @@ Added languages
 - JS
 - Ruby
 - Clojure
+- TCL
 
 Usage
 -----