diff --git a/samples/helloworld.c b/samples/helloworld.c
index 9aa4197d8..b4e1ee6a3 100644
--- a/samples/helloworld.c
+++ b/samples/helloworld.c
@@ -2,7 +2,7 @@
 
 #include <stdio.h>
 
-int main() {
-   printf("Hello, World!");
+int main(void) {
+   printf("Hello, World!\n");
    return 0;
 }