diff --git a/defs.h b/defs.h
index 9e269c7a..14e46535 100644
--- a/defs.h
+++ b/defs.h
@@ -247,8 +247,6 @@ struct tcb {
 	struct timeval stime;	/* System time usage as of last process wait */
 	struct timeval dtime;	/* Delta for system time usage */
 	struct timeval etime;	/* Syscall entry time */
-				/* Support for tracing forked processes: */
-	long inst[2];		/* Saved clone args (badly named) */
 
 #ifdef USE_LIBUNWIND
 	struct UPT_info* libunwind_ui;