diff --git a/sys/kern/kern_descrip.c b/sys/kern/kern_descrip.c
index f73a4cf874d4..0b251c603fea 100644
--- a/sys/kern/kern_descrip.c
+++ b/sys/kern/kern_descrip.c
@@ -1850,9 +1850,10 @@ fdshare(struct filedesc *fdp)
  * Unshare a filedesc structure, if necessary by making a copy
  */
 void
-fdunshare(struct proc *p, struct thread *td)
+fdunshare(struct thread *td)
 {
 	struct filedesc *tmp;
+	struct proc *p = td->td_proc;
 
 	if (p->p_fd->fd_refcnt == 1)
 		return;
diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
index 7d3bad9d50c4..1d3a46d439af 100644
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -594,7 +594,7 @@ interpret:
 	 * For security and other reasons, the file descriptor table cannot
 	 * be shared after an exec.
 	 */
-	fdunshare(p, td);
+	fdunshare(td);
 
 	/*
 	 * Malloc things before we need locks.
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c
index b3d9c243f942..8135afba7e28 100644
--- a/sys/kern/kern_fork.c
+++ b/sys/kern/kern_fork.c
@@ -341,8 +341,8 @@ fork_norfproc(struct thread *td, int flags)
 	/*
 	 * Unshare file descriptors (from parent).
 	 */
-	if (flags & RFFDG) 
-		fdunshare(p1, td);
+	if (flags & RFFDG)
+		fdunshare(td);
 
 fail:
 	if (((p1->p_flag & (P_HADTHREADS|P_SYSTEM)) == P_HADTHREADS) &&
diff --git a/sys/sys/filedesc.h b/sys/sys/filedesc.h
index 972cfc924750..d407cd20f44b 100644
--- a/sys/sys/filedesc.h
+++ b/sys/sys/filedesc.h
@@ -152,7 +152,7 @@ int	fdcheckstd(struct thread *td);
 void	fdclose(struct filedesc *fdp, struct file *fp, int idx, struct thread *td);
 void	fdcloseexec(struct thread *td);
 struct	filedesc *fdcopy(struct filedesc *fdp);
-void	fdunshare(struct proc *p, struct thread *td);
+void	fdunshare(struct thread *td);
 void	fdescfree(struct thread *td);
 struct	filedesc *fdinit(struct filedesc *fdp);
 struct	filedesc *fdshare(struct filedesc *fdp);