diff --git a/include/cxx/cstdio b/include/cxx/cstdio
index e10311ae57..783227f5b3 100644
--- a/include/cxx/cstdio
+++ b/include/cxx/cstdio
@@ -76,6 +76,8 @@ namespace std
   using ::fwrite;
   using ::gets;
   using ::gets_s;
+  using ::setbuf;
+  using ::setvbuf;
   using ::ungetc;
 
   // Operations on the stdout stream, buffers, paths, and the whole printf-family
diff --git a/include/cxx/cunistd b/include/cxx/cunistd
index fc437cc987..95118c1732 100644
--- a/include/cxx/cunistd
+++ b/include/cxx/cunistd
@@ -92,8 +92,8 @@ namespace std
   // Operations on file paths
 
   using ::access;
-  using ::unlink;
   using ::rmdir;
+  using ::unlink;
 #ifdef CONFIG_PSEUDOFS_SOFTLINKS
   using ::link;
   using ::readlink;