diff -r 84281e7a9b9e -r 60cd4773f745 src/mem/physical.cc
--- a/src/mem/physical.cc	Thu Mar 10 13:50:49 2016 +0000
+++ b/src/mem/physical.cc	Thu Mar 10 14:06:46 2016 +0000
@@ -59,10 +59,10 @@
 /**
  * On Linux, MAP_NORESERVE allow us to simulate a very large memory
  * without committing to actually providing the swap space on the
- * host. On OSX the MAP_NORESERVE flag does not exist, so simply make
- * it 0.
+ * host. On FreeBSD or OSX the MAP_NORESERVE flag does not exist,
+ * so simply make it 0.
  */
-#if defined(__APPLE__)
+#if defined(__APPLE__) || defined(__FreeBSD__)
 #ifndef MAP_NORESERVE
 #define MAP_NORESERVE 0
 #endif