diff --git a/lib/otp/Makefile.in b/lib/otp/Makefile.in
index 2889e7f68..a40f7f8a3 100644
--- a/lib/otp/Makefile.in
+++ b/lib/otp/Makefile.in
@@ -28,6 +28,7 @@ LIBEXT = @LIBEXT@
 SHLIBEXT = @SHLIBEXT@
 SHARED = @SHARED@
 LIB = $(LIBNAME).$(LIBEXT)
+PROGS = otptest
 
 SOURCES = otp.c otp_challenge.c otp_db.c otp_md.c \
 	  otp_parse.c otp_print.c otp_verify.c
@@ -35,7 +36,7 @@ SOURCES = otp.c otp_challenge.c otp_db.c otp_md.c \
 OBJECTS = otp.o otp_challenge.o otp_db.o otp_md.o \
 	  otp_parse.o otp_print.o otp_verify.o
 
-all: $(LIB)
+all: $(LIB) $(PROGS)
 
 Wall:
 	make CFLAGS="-g -Wall -Wno-comment -Wmissing-prototypes -Wmissing-declarations -D__USE_FIXED_PROTOTYPES__"
@@ -52,10 +53,11 @@ uninstall:
 TAGS: $(SOURCES)
 	etags $(SOURCES)
 
-check:
+check:	otptest
+	./otptest
 
 clean:
-	rm -f $(LIB) *.o *.a
+	rm -f $(LIB) $(PROGS) *.o *.a
 
 mostlyclean: clean
 
@@ -65,6 +67,9 @@ distclean: clean
 realclean: distclean
 	rm -f TAGS
 
+otptest: otptest.o all
+	$(CC) $(LD_FLAGS) $(LDFLAGS) -o $@ otptest.o -L. -lotp -L../des -ldes
+
 $(LIBNAME).a: $(OBJECTS)
 	rm -f $@
 	$(AR) cr $@ $(OBJECTS)