diff --git a/components/cbor/CMakeLists.txt b/components/cbor/CMakeLists.txt
index 7f12fbe9c9..f213c22733 100644
--- a/components/cbor/CMakeLists.txt
+++ b/components/cbor/CMakeLists.txt
@@ -13,3 +13,8 @@ idf_component_register(SRCS "tinycbor/src/cborencoder_close_container_checked.c"
 
 # for open_memstream.c
 set_source_files_properties(tinycbor/src/open_memstream.c PROPERTIES COMPILE_DEFINITIONS "__linux__")
+
+# workaround for the fact that we are passing -ffreestanding to Clang
+if(CMAKE_C_COMPILER_ID MATCHES "Clang")
+    target_compile_options(${COMPONENT_LIB} PRIVATE "-U __STDC_HOSTED__")
+endif()