diff --git a/components/finsh/msh.c b/components/finsh/msh.c
index 7bf0a90f53d981ac2b2db8363a69bfeff9cc84f9..22e2cf5389cce5891041507144aa77db63d50629 100644
--- a/components/finsh/msh.c
+++ b/components/finsh/msh.c
@@ -80,9 +80,10 @@ int cmd_free(int argc, char **argv)
     rt_size_t total = 0, used = 0, max_used = 0;
 
     rt_memory_info(&total, &used, &max_used);
-    rt_kprintf("total   : %d\n", total);
-    rt_kprintf("used    : %d\n", used);
-    rt_kprintf("maximum : %d\n", max_used);
+    rt_kprintf("total    : %d\n", total);
+    rt_kprintf("used     : %d\n", used);
+    rt_kprintf("maximum  : %d\n", max_used);
+    rt_kprintf("available: %d\n", total - used);
 #endif
     return 0;
 }