diff --git a/c_headers/intrin.h b/c_headers/intrin.h
index 91914214e29940f35f0dc4c32585ad4dabe62372..edb947eef659236b5dc49e1236bdb502a6182447 100644
--- a/c_headers/intrin.h
+++ b/c_headers/intrin.h
@@ -863,20 +863,6 @@ __nop(void) {
   __asm__ volatile ("nop");
 }
 #endif
-#if defined(__x86_64__)
-static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
-__shiftleft128(unsigned __int64 __l, unsigned __int64 __h, unsigned char __d) {
-  unsigned __int128 __val = ((unsigned __int128)__h << 64) | __l;
-  unsigned __int128 __res = __val << (__d & 63);
-  return (unsigned __int64)(__res >> 64);
-}
-static __inline__ unsigned __int64 __DEFAULT_FN_ATTRS
-__shiftright128(unsigned __int64 __l, unsigned __int64 __h, unsigned char __d) {
-  unsigned __int128 __val = ((unsigned __int128)__h << 64) | __l;
-  unsigned __int128 __res = __val >> (__d & 63);
-  return (unsigned __int64)__res;
-}
-#endif
 
 /*----------------------------------------------------------------------------*\
 |* Privileged intrinsics
diff --git a/c_headers/unwind.h b/c_headers/unwind.h
index 345fa4d0c1930cd02e0258e5f13119b9f2ebb607..0e8317e5b9d90c0f9b0876a5c9aab73232f2c46b 100644
--- a/c_headers/unwind.h
+++ b/c_headers/unwind.h
@@ -154,8 +154,12 @@ struct _Unwind_Control_Block {
 struct _Unwind_Exception {
   _Unwind_Exception_Class exception_class;
   _Unwind_Exception_Cleanup_Fn exception_cleanup;
+#if !defined (__USING_SJLJ_EXCEPTIONS__) && defined (__SEH__)
+  _Unwind_Word private_[6];
+#else
   _Unwind_Word private_1;
   _Unwind_Word private_2;
+#endif
   /* The Itanium ABI requires that _Unwind_Exception objects are "double-word
    * aligned".  GCC has interpreted this to mean "use the maximum useful
    * alignment for the target"; so do we. */