diff --git a/data/filetype_extensions.conf b/data/filetype_extensions.conf
index 02fb20a1..e161d49f 100644
--- a/data/filetype_extensions.conf
+++ b/data/filetype_extensions.conf
@@ -61,7 +61,7 @@ Ruby=*.rb;*.rhtml;*.ruby;*.gemspec;Gemfile;rakefile;Rakefile;
 Scala=*.scala;*.scl;
 Sh=*.sh;configure;configure.in;configure.in.in;configure.ac;*.ksh;*.mksh;*.zsh;*.ash;*.bash;.bashrc;bash.bashrc;.bash_*;bash_*;*.m4;PKGBUILD;*profile;
 SQL=*.sql;
-Tcl=*.tcl;*.tk;*.wish;
+Tcl=*.tcl;*.tk;*.wish;*.exp;
 Txt2tags=*.t2t;
 Vala=*.vala;*.vapi;
 Verilog=*.v;