diff --git a/src/tools/builtin.jam b/src/tools/builtin.jam
index 593f50ae1..7d15abae1 100644
--- a/src/tools/builtin.jam
+++ b/src/tools/builtin.jam
@@ -44,6 +44,10 @@ feature inlining : off on full : propagated ;
 feature threading : single multi : propagated ;
 feature rtti : on off : propagated ;
 feature exception-handling : on off : propagated ;
+# Whether there is support for asynchronous EH (e.g. catching SEGVs)
+feature asynch-exceptions : off on : propagated ;  
+# Whether all extern "C" functions are considered nothrow by default
+feature extern-c-nothrow : off on : propagated ;
 feature debug-symbols : on off : propagated ;
 feature define : : free ;
 feature "include" : : free path ; #order-sensitive ;
@@ -56,6 +60,7 @@ feature version : : free ;
 
 feature.feature location-prefix : : free ;
 
+
 # The following features are incidental, since
 # in themself they have no effect on build products.
 # Not making them incidental will result in problems in corner
diff --git a/src/tools/msvc.jam b/src/tools/msvc.jam
index f0c92b930..33407f61d 100644
--- a/src/tools/msvc.jam
+++ b/src/tools/msvc.jam
@@ -247,9 +247,6 @@ flags msvc.compile CFLAGS <inlining>off : /Ob0 ;
 flags msvc.compile CFLAGS <inlining>on : /Ob1 ;
 flags msvc.compile CFLAGS <inlining>full : /Ob2 ;
 
-feature.feature asynch-exceptions : off on : propagated ;
-feature.feature extern-c-nothrow : off on : propagated ;
-
 flags msvc.compile C++FLAGS  <exception-handling>on/<asynch-exceptions>off/<extern-c-nothrow>off : /EHs ;
 flags msvc.compile C++FLAGS  <exception-handling>on/<asynch-exceptions>off/<extern-c-nothrow>on : /EHsc ;
 flags msvc.compile C++FLAGS  <exception-handling>on/<asynch-exceptions>on/<extern-c-nothrow>off : /EHa ;