Index: libc/include/io/io.h
===================================================================
--- libc/include/io/io.h	(revision 29a9f628c8583835e581747cfad7877e27f6d810)
+++ libc/include/io/io.h	(revision c9857c6049423e28c75585d50f395e3aa0da24d3)
@@ -34,4 +34,5 @@
 int putnchars(const char * buf, size_t count);
 int putstr(const char * str);
+int putchar(int c);
 
 #endif