diff --git a/mail/Makefile b/mail/Makefile
index 358c1629cb28..a7a2211532e4 100644
--- a/mail/Makefile
+++ b/mail/Makefile
@@ -24,6 +24,7 @@
     SUBDIR += fetchmail
     SUBDIR += gbuffy
     SUBDIR += gensig
+    SUBDIR += glacier
     SUBDIR += glbiff
     SUBDIR += grepmail
     SUBDIR += hbiff