diff --git a/src/proto.h b/src/proto.h
index ed16258..f8920da 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -92,6 +92,7 @@
 # ifdef FEAT_HANGULIN
 #  include "hangulin.pro"
 # endif
+# include "hashtable.pro"
 # include "main.pro"
 # include "mark.pro"
 # if !defined MESSAGE_FILE || defined(HAVE_STDARG_H)