diff --git a/objects/pflash/ccan/array_size/test/compile_fail.c b/objects/pflash/ccan/array_size/test/compile_fail.c
new file mode 100644
index 0000000..0ba493d
--- /dev/null
+++ b/objects/pflash/ccan/array_size/test/compile_fail.c
@@ -0,0 +1,14 @@
+#include <ccan/array_size/array_size.h>
+
+int main(int argc, char *argv[8])
+{
+	char array[100];
+#ifdef FAIL
+	return ARRAY_SIZE(argv) + ARRAY_SIZE(array);
+#if !HAVE_TYPEOF || !HAVE_BUILTIN_TYPES_COMPATIBLE_P
+#error "Unfortunately we don't fail if _array_size_chk is a noop."
+#endif
+#else
+	return ARRAY_SIZE(array);
+#endif
+}