1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 686ddeb..543e021 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ calc-example/calc: calc-example/calc.o calc-example/calc-syntax.o libparser.a
 	$(CC) -o $@ calc-example/calc.o calc-example/calc-syntax.o libparser.a $(LDFLAGS)
 
 calc-example/calc-syntax.c: libparser-generate calc-example/calc.syntax
-	./libparser-generate _expr < calc-example/calc.syntax > $@
+	./libparser-generate _expr < calc-example/calc.syntax > $@ || (rm -f -- $@; false)
 
 install: libparser.a libparser.$(LIBEXT) libparser-generate
 	mkdir -p -- "$(DESTDIR)$(PREFIX)/bin"