diff --git a/utils/CMakeLists.txt b/utils/CMakeLists.txt
index 2f98b98c..b56c86f8 100644
--- a/utils/CMakeLists.txt
+++ b/utils/CMakeLists.txt
@@ -111,4 +111,4 @@ sdk_library_add_sources(bflb_timestamp/bflb_timestamp.c)
 sdk_add_include_directories(bflb_timestamp)
 
 sdk_add_compile_options(-fno-builtin-printf)
-# sdk_add_link_options(-u_malloc_r -u_vsnprintf)
\ No newline at end of file
+sdk_add_link_options(-u_malloc_r)
\ No newline at end of file