--- a/src/java.base/unix/native/libjava/childproc.c	Fri Mar 02 19:10:12 2018 +0100
+++ b/src/java.base/unix/native/libjava/childproc.c	Sat Mar 03 08:21:47 2018 +0100
@@ -129,7 +129,7 @@
 }
 
 int
-magicNumber() {
+magicNumber(void) {
     return 43110;
 }