diff --git a/lib/libc_r/uthread/uthread_mattr_init.c b/lib/libc_r/uthread/uthread_mattr_init.c
index 5e4af710ecb..a968a375eee 100644
--- a/lib/libc_r/uthread/uthread_mattr_init.c
+++ b/lib/libc_r/uthread/uthread_mattr_init.c
@@ -12,7 +12,7 @@
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
- *	This product includes software developed by John Birrell.
+ *	This product includes software developed by Jeffrey Hsu.
  * 4. Neither the name of the author nor the names of any co-contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
diff --git a/lib/libc_r/uthread/uthread_mattr_kind_np.c b/lib/libc_r/uthread/uthread_mattr_kind_np.c
index 04db2a0ffbb..0ce2ebfb6d9 100644
--- a/lib/libc_r/uthread/uthread_mattr_kind_np.c
+++ b/lib/libc_r/uthread/uthread_mattr_kind_np.c
@@ -12,7 +12,7 @@
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
- *	This product includes software developed by John Birrell.
+ *	This product includes software developed by Jeffrey Hsu.
  * 4. Neither the name of the author nor the names of any co-contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.