--- a/src/java.desktop/unix/native/libawt_xawt/xawt/XWindow.c	Fri Mar 02 19:10:12 2018 +0100
+++ b/src/java.desktop/unix/native/libawt_xawt/xawt/XWindow.c	Sat Mar 03 08:21:47 2018 +0100
@@ -452,7 +452,7 @@
 };
 
 static Boolean
-keyboardHasKanaLockKey()
+keyboardHasKanaLockKey(void)
 {
     static Boolean haveResult = FALSE;
     static Boolean result = FALSE;