diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog
index 537a0601d..e148e8dd4 100644
--- a/include/opcode/ChangeLog
+++ b/include/opcode/ChangeLog
@@ -1,3 +1,7 @@
+2011-04-18  Julian Brown  <julian@codesourcery.com>
+
+	* arm.h (ARM_AEXT_V7_ARM): Remove ARM_EXT_OS from bitmask.
+
 2011-04-11  Dan McDonald  <dan@wellkeeper.com>
 
 	PR gas/12296
diff --git a/include/opcode/arm.h b/include/opcode/arm.h
index c6fb22014..297ca6373 100644
--- a/include/opcode/arm.h
+++ b/include/opcode/arm.h
@@ -109,8 +109,7 @@
 #define ARM_AEXT_V6KT2  (ARM_AEXT_V6T2 | ARM_EXT_V6K)
 #define ARM_AEXT_V6ZT2  (ARM_AEXT_V6T2 | ARM_EXT_SEC)
 #define ARM_AEXT_V6ZKT2 (ARM_AEXT_V6T2 | ARM_EXT_V6K | ARM_EXT_SEC)
-#define ARM_AEXT_V7_ARM	(ARM_AEXT_V6KT2 | ARM_EXT_V7 | ARM_EXT_BARRIER \
-    | ARM_EXT_OS)
+#define ARM_AEXT_V7_ARM	(ARM_AEXT_V6KT2 | ARM_EXT_V7 | ARM_EXT_BARRIER)
 #define ARM_AEXT_V7A	(ARM_AEXT_V7_ARM | ARM_EXT_V7A)
 #define ARM_AEXT_V7R	(ARM_AEXT_V7_ARM | ARM_EXT_V7R | ARM_EXT_DIV)
 #define ARM_AEXT_NOTM \