diff --git a/Proc/kill.d b/Proc/kill.d
index 215625f..68e268e 100755
--- a/Proc/kill.d
+++ b/Proc/kill.d
@@ -47,7 +47,7 @@ dtrace:::BEGIN
 syscall::kill:entry
 {
 	/* Record target PID and signal */
-	self->target = arg0;
+	self->target = (pid_t)arg0;
 	self->signal = arg1;
 }