diff --git a/src/pkg/debug/macho/testdata/hello.c b/src/pkg/debug/macho/testdata/hello.c
index 2264d04..8626b30 100644
--- a/src/pkg/debug/macho/testdata/hello.c
+++ b/src/pkg/debug/macho/testdata/hello.c
@@ -1,3 +1,6 @@
-main() {
-	printf("hello, world");
+#include <stdio.h>
+
+main()
+{
+	printf("hello, world\n");
 }