--- Libc/Libc-320/pthreads/pthread_rwlock_wrlock.3
+++ Libc/Libc-498/pthreads/pthread_rwlock_wrlock.3
@@ -28,20 +28,24 @@
 .Dt PTHREAD_RWLOCK_WRLOCK 3
 .Os
 .Sh NAME
-.Nm pthread_rwlock_wrlock ,
-.Nm pthread_rwlock_trywrlock
+.Nm pthread_rwlock_trywrlock ,
+.Nm pthread_rwlock_wrlock
 .Nd acquire a read/write lock for writing
 .Sh SYNOPSIS
 .In pthread.h
 .Ft int
-.Fn pthread_rwlock_wrlock "pthread_rwlock_t *lock"
+.Fo pthread_rwlock_trywrlock
+.Fa "pthread_rwlock_t *rwlock"
+.Fc
 .Ft int
-.Fn pthread_rwlock_trywrlock "pthread_rwlock_t *lock"
+.Fo pthread_rwlock_wrlock
+.Fa "pthread_rwlock_t *rwlock"
+.Fc
 .Sh DESCRIPTION
 The
 .Fn pthread_rwlock_wrlock
 function blocks until a write lock can be acquired against
-.Fa lock .
+.Fa rwlock .
 The
 .Fn pthread_rwlock_trywrlock
 function performs the same action, but does not block if the lock
@@ -56,8 +60,8 @@
 .Fn pthread_rwlock_wrlock
 and
 .Fn pthread_rwlock_trywrlock
-functions will return zero.  Otherwise an error number will be returned
-to indicate the error.
+functions will return zero.
+Otherwise, an error number will be returned  to indicate the error.
 .Sh SEE ALSO
 .Xr pthread_rwlock_trywrlock 3 ,
 .Xr pthread_rwlock_unlock 3 ,
@@ -89,7 +93,7 @@
 or writing).
 .It Bq Er EINVAL
 The value specified by
-.Fa lock
+.Fa rwlock
 is invalid.
 .It Bq Er ENOMEM
 Insufficient memory exists to initialize the lock (applies to