1 files changed, 5 insertions, 0 deletions
diff --git a/vm/vm_user.c b/vm/vm_user.c
index 3ef64dfc..9e789eba 100644
--- a/vm/vm_user.c
+++ b/vm/vm_user.c
@@ -338,6 +338,11 @@ kern_return_t vm_map(
 	if (size == 0)
 		return KERN_INVALID_ARGUMENT;
 
+#ifdef USER32
+        if (mask & 0x80000000)
+            mask |= 0xffffffff00000000;
+#endif
+
 	*address = trunc_page(*address);
 	size = round_page(size);