diff --git a/modules/luci-base/src/Makefile b/modules/luci-base/src/Makefile
index ad309e5c6b..431248ee17 100644
--- a/modules/luci-base/src/Makefile
+++ b/modules/luci-base/src/Makefile
@@ -2,7 +2,7 @@
 	$(CC) $(CPPFLAGS) $(CFLAGS) $(FPIC) -DNDEBUG -c -o $@ $<
 
 contrib/lemon: contrib/lemon.c contrib/lempar.c
-	cc -o contrib/lemon $<
+	cc -std=gnu17 -o contrib/lemon $<
 
 lib/plural_formula.c: lib/plural_formula.y contrib/lemon
 	./contrib/lemon -q $<