diff --git a/ChangeLog b/ChangeLog
index a6aa6051b8..24144297c3 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -10967,4 +10967,7 @@
 	  from Paul Alexander Patience (2014-09-10).
 	* arch/arm/src/lpc43xx/lpc32_ehci.c and .h:  LPC43xx EHCI driver from
 	  Ilya Averyanov (2015-09-10).
-
+	* ARMv7-M, all "lazy" interrupt stack logic.  Assembly instruction
+	  that fetches the saved value is incorrect; replace with more
+	  traditional push and pop.  This is an important fix.  Noted by
+	  Stefan Kolb (2015-09-14).
diff --git a/arch b/arch
index b185e7bda9..e97c72f3ce 160000
--- a/arch
+++ b/arch
@@ -1 +1 @@
-Subproject commit b185e7bda960fe11a2f8f8c6766e6fabb23ff41a
+Subproject commit e97c72f3ce29b8a776b7e47c21281b3a7d5a6fbc