diff --git a/src/Make_os2.mak b/src/Make_os2.mak
index 4d21dc6..1750e71 100644
--- a/src/Make_os2.mak
+++ b/src/Make_os2.mak
@@ -53,6 +53,7 @@
 	fileio.o \
 	fold.o \
 	getchar.o \
+	hashtable.o \
 	main.o \
 	mark.o \
 	memfile.o \
@@ -122,6 +123,7 @@
 fileio.o:	fileio.c  $(INCL)
 fold.o:		fold.c  $(INCL)
 getchar.o:	getchar.c  $(INCL)
+hashtable.o:	hashtable.c  $(INCL)
 main.o:		main.c  $(INCL)
 mark.o:		mark.c  $(INCL)
 memfile.o:	memfile.c  $(INCL)