diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index d5f508de4b7..7ad315ed8b9 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,9 @@
+2013-03-12  Andrew John Hughes  <gnu.andrew@redhat.com>
+
+	* include/posix-threads.h:
+	(_Jv_MutexCheckMonitor(_Jv_Mutex_t)): Use
+	pthread_equal rather than !=.
+
 2013-01-07  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* Makefile.am (lib_gnu_awt_xlib_la_LDFLAGS): Replace
diff --git a/libjava/include/posix-threads.h b/libjava/include/posix-threads.h
index 59e65f74499..1ec311d7fa0 100644
--- a/libjava/include/posix-threads.h
+++ b/libjava/include/posix-threads.h
@@ -79,7 +79,7 @@ typedef struct
 inline int
 _Jv_MutexCheckMonitor (_Jv_Mutex_t *mu)
 {
-  return (mu->owner != pthread_self());
+  return (pthread_equal(mu->owner, pthread_self()) == 0);
 }
 
 // Type identifying a POSIX thread.