diff --git a/lisp/os.h b/lisp/os.h
index 7756e184e31bf8da314ef07bb9c00908c4da2c0d..e7cc5c0e658686621209eb3692849694550c75a8 100644
--- a/lisp/os.h
+++ b/lisp/os.h
@@ -1,5 +1,5 @@
 /*
- * $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/lisp/os.h,v 1.17 2007/01/01 11:53:03 cshapiro Exp $
+ * $Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/lisp/os.h,v 1.18 2007/11/16 06:05:35 cshapiro Exp $
  *
  * Common interface for os-dependent functions.
  *
@@ -59,9 +59,6 @@
 #ifndef CODE
 #define CODE(code)  code
 #endif
-#ifndef CTXT_SIGMASK
-#define CTXT_SIGMASK(context) context->sc_mask
-#endif
 #ifndef SAVE_CONTEXT
 #define SAVE_CONTEXT() do {} while(0)
 #endif