diff --git a/glib/gthread-posix.c b/glib/gthread-posix.c
index 403a014b6..23371ae0f 100644
--- a/glib/gthread-posix.c
+++ b/glib/gthread-posix.c
@@ -184,13 +184,12 @@ g_mutex_init (GMutex *mutex)
  * Calling g_mutex_clear() on a locked mutex leads to undefined
  * behaviour.
  *
- * Since: 2.32
+ * Sine: 2.32
  */
 void
 g_mutex_clear (GMutex *mutex)
 {
   g_mutex_impl_free (mutex->p);
-  mutex->p = NULL;
 }
 
 /**
@@ -362,7 +361,6 @@ void
 g_rec_mutex_clear (GRecMutex *rec_mutex)
 {
   g_rec_mutex_impl_free (rec_mutex->p);
-  rec_mutex->p = NULL;
 }
 
 /**
@@ -520,7 +518,6 @@ void
 g_rw_lock_clear (GRWLock *rw_lock)
 {
   g_rw_lock_impl_free (rw_lock->p);
-  rw_lock->p = NULL;
 }
 
 /**
@@ -725,7 +722,6 @@ void
 g_cond_clear (GCond *cond)
 {
   g_cond_impl_free (cond->p);
-  cond->p = NULL;
 }
 
 /**
diff --git a/glib/gthread-win32.c b/glib/gthread-win32.c
index 1f832e3f4..c54f2bdbc 100644
--- a/glib/gthread-win32.c
+++ b/glib/gthread-win32.c
@@ -198,7 +198,6 @@ void
 g_rec_mutex_clear (GRecMutex *mutex)
 {
   g_rec_mutex_impl_free (mutex->p);
-  mutex->p = NULL;
 }
 
 void