diff --git a/include/cxx/cstdio b/include/cxx/cstdio
index 783227f5b3b..ad15570ea82 100644
--- a/include/cxx/cstdio
+++ b/include/cxx/cstdio
@@ -76,8 +76,10 @@ namespace std
   using ::fwrite;
   using ::gets;
   using ::gets_s;
+#ifndef CONFIG_STDIO_DISABLE_BUFFERING
   using ::setbuf;
   using ::setvbuf;
+#endif
   using ::ungetc;
 
   // Operations on the stdout stream, buffers, paths, and the whole printf-family