Index: uspace/lib/c/include/stdio.h
===================================================================
--- uspace/lib/c/include/stdio.h	(revision 7a0359b903311f67678b4a0a3ebbcf0daf6eab38)
+++ uspace/lib/c/include/stdio.h	(revision ff586e06f001be9947ba73a4a1bec6ad6383ba0f)
@@ -171,4 +171,5 @@
 extern off64_t ftell(FILE *);
 extern int feof(FILE *);
+extern int fileno(FILE *);
 
 extern int fflush(FILE *);