1 files changed, 9 insertions, 0 deletions

diff --git a/src/s/freebsd.h b/src/s/freebsd.h
index 057697db1db..b7a983b02c6 100644
--- a/src/s/freebsd.h
+++ b/src/s/freebsd.h
@@ -185,3 +185,12 @@
 
 #define GC_SETJMP_WORKS 1
 
+/* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
+   stack.  */
+
+#define GC_MARK_STACK   1
+
+/* Define REL_ALLOC_MMAP to use an ralloc implementation based on
+   mmap(2)  */
+
+#define REL_ALLOC_MMAP  1