diff --git a/lib/aos/slab.c b/lib/aos/slab.c
index 43421f8..c113224 100644
--- a/lib/aos/slab.c
+++ b/lib/aos/slab.c
@@ -190,6 +190,7 @@ errval_t slab_refill_pages(struct slab_allocator *slabs, size_t bytes)
     err = slab_refill_no_pagefault(slabs, cap, bytes);
     if (err_is_fail(err)) {
         slot_free(cap);
+        return err;
     }
 
     return err;