diff --git a/boehm-gc/ChangeLog b/boehm-gc/ChangeLog
index a002c4cdbb16..e59f50791c88 100644
--- a/boehm-gc/ChangeLog
+++ b/boehm-gc/ChangeLog
@@ -1,3 +1,7 @@
+2003-02-11  Andreas Tobler  <a.tobler@schweiz.ch>
+
+	* include/private/gcconfig.h: undefine MPROTECT_VDB for MACOSX
+
 2003-01-27  Alexandre Oliva  <aoliva@redhat.com>
 
 	* configure.in (toolexecdir, toolexeclibdir): Set and AC_SUBST.
diff --git a/boehm-gc/include/private/gcconfig.h b/boehm-gc/include/private/gcconfig.h
index 33d80d2c8bad..f71bb9813ed7 100644
--- a/boehm-gc/include/private/gcconfig.h
+++ b/boehm-gc/include/private/gcconfig.h
@@ -685,7 +685,7 @@
 #     define DATASTART ((ptr_t) get_etext())
 #     define STACKBOTTOM ((ptr_t) 0xc0000000)
 #     define DATAEND	/* not needed */
-#     define MPROTECT_VDB
+#     undef MPROTECT_VDB
 #     include <unistd.h>
 #     define GETPAGESIZE() getpagesize()
 #   endif