diff --git a/zephyr/lib/alloc.c b/zephyr/lib/alloc.c
index ff49f1b96979..a85c0bab5973 100644
--- a/zephyr/lib/alloc.c
+++ b/zephyr/lib/alloc.c
@@ -27,7 +27,7 @@ struct k_spinlock vmh_lock;
 #undef	HEAPMEM_SIZE
 /* Buffers are allocated from virtual space so we can safely reduce the heap size.
  */
-#define	HEAPMEM_SIZE 0x20000
+#define	HEAPMEM_SIZE 0x40000
 #endif /* CONFIG_VIRTUAL_HEAP */