diff --git a/hello.c b/hello.c
index a194562..3b89f85 100644
--- a/hello.c
+++ b/hello.c
@@ -5,7 +5,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int main() {
+int main( void) {
 	puts( "hello, world") ;
 	return EXIT_SUCCESS ;
 }