Index: uspace/lib/c/include/stdio.h
===================================================================
--- uspace/lib/c/include/stdio.h	(revision 7a0359b903311f67678b4a0a3ebbcf0daf6eab38)
+++ uspace/lib/c/include/stdio.h	(revision 2d0c3a666e5f1f5195ff4c489e3e90fa9cf7e215)
@@ -171,4 +171,5 @@
 extern off64_t ftell(FILE *);
 extern int feof(FILE *);
+extern int fileno(FILE *);
 
 extern int fflush(FILE *);