1 files changed, 10 insertions, 1 deletions
diff --git a/compat.h b/compat.h
index 1b0b7ab6..addf43d8 100644
--- a/compat.h
+++ b/compat.h
@@ -1,4 +1,4 @@
-/* $Id: compat.h,v 1.15 2009-08-26 09:10:47 nicm Exp $ */
+/* $Id: compat.h,v 1.16 2009-09-02 12:30:56 nicm Exp $ */
 
 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
@@ -91,6 +91,15 @@ typedef uint64_t u_int64_t;
 #include "compat/imsg.h"
 #endif
 
+#ifdef HAVE_BROKEN_CMSG_FIRSTHDR
+/* Broken on OS X. */
+#undef CMSG_FIRSTHDR
+#define CMSG_FIRSTHDR(mhdr) \
+        ((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? \
+	    (struct cmsghdr *)(mhdr)->msg_control : \
+	    (struct cmsghdr *)NULL)
+#endif
+
 #ifndef INFTIM
 #define INFTIM -1
 #endif