diff --git a/Makefile b/Makefile
index 7f6dcd0c..8b57e86b 100644
--- a/Makefile
+++ b/Makefile
@@ -23,7 +23,7 @@ SRC = system syseng sysen1 sysen2 sysen3 sysnet kshack dragon channa	\
       jim jm jpg macrak maxdoc maxsrc mrg munfas paulw reh rlb rlb% share \
       tensor transl wgd zz graphs lmlib pratt quux scheme gsb ejs mudsys \
       draw wl taa tj6 budd sharem ucode rvb kldcp math as imsrc gls demo \
-      macsym lmcons dmcg hack hibou agb
+      macsym lmcons dmcg hack hibou agb gt40
 DOC = info _info_ sysdoc sysnet syshst kshack _teco_ emacs emacs1 c kcc \
       chprog sail draw wl pc tj6 share _glpr_ _xgpr_ inquir mudman system \
       xfont maxout ucode moon acount alan channa fonts games graphs humor \