--- a/squashfs-tools/mksquashfs.c
+++ b/squashfs-tools/mksquashfs.c
@@ -290,7 +290,7 @@ void restorefs()
 }
 
 
-void sighandler()
+void sighandler(int i)
 {
 	if(interrupted == 1)
 		restorefs();
@@ -302,7 +302,7 @@ void sighandler()
 }
 
 
-void sighandler2()
+void sighandler2(int i)
 {
 	EXIT_MKSQUASHFS();
 }