--- Objects/obmalloc.c	2014-06-19 20:32:23.873120883 +0100
+++ Objects/obmalloc.c	2014-06-19 20:34:30.029118624 +0100
@@ -595,6 +595,9 @@
 #ifdef ARENAS_USE_MMAP
     arenaobj->address = (uptr)mmap(NULL, ARENA_SIZE, PROT_READ|PROT_WRITE,
                                    MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+    if (arenaobj->address == (uptr)MAP_FAILED) {
+        arenaobj->address = 0;
+    }
 #else
     arenaobj->address = (uptr)malloc(ARENA_SIZE);
 #endif