diff --git a/mps/code/exposet0.c b/mps/code/exposet0.c
index a1e8fcdc6e8..7e097d6b034 100644
--- a/mps/code/exposet0.c
+++ b/mps/code/exposet0.c
@@ -245,7 +245,7 @@ int main(int argc, char *argv[])
   die(mps_arena_create(&arena, mps_arena_class_vm(), 2*testArenaSIZE),
       "arena_create");
   mps_message_type_enable(arena, mps_message_type_gc());
-  die(mps_arena_commit_limit_set(arena, testArenaSIZE), "set limit");
+  die(mps_arena_commit_limit_set(arena, 2*testArenaSIZE), "set limit");
   die(mps_thread_reg(&thread, arena), "thread_reg");
   mps_tramp(&r, test, arena, 0);
   mps_thread_dereg(thread);