diff --git a/src/os_mac.h b/src/os_mac.h
index 7a54ee5..aadaed7 100644
--- a/src/os_mac.h
+++ b/src/os_mac.h
@@ -268,9 +268,15 @@
  */
 
 #ifdef MACOS_X_UNIX
-# define SIGPROTOARG	(int)
-# define SIGDEFARG(s)	(s) int s;
-# define SIGDUMMYARG	0
+# ifndef SIGPROTOARG
+#  define SIGPROTOARG	(int)
+# endif
+# ifndef SIGDEFARG
+#  define SIGDEFARG(s)	(s) int s UNUSED;
+# endif
+# ifndef SIGDUMMYARG
+#  define SIGDUMMYARG	0
+# endif
 # undef  HAVE_AVAIL_MEM
 # ifndef HAVE_CONFIG_H
 #  define RETSIGTYPE void
diff --git a/src/version.c b/src/version.c
index 6d92a03..6043494 100644
--- a/src/version.c
+++ b/src/version.c
@@ -677,6 +677,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    212,
+/**/
     211,
 /**/
     210,