Index: readline-5.2/rltypedefs.h
===================================================================
--- readline-5.2.orig/rltypedefs.h
+++ readline-5.2/rltypedefs.h
@@ -23,6 +23,8 @@
 #ifndef _RL_TYPEDEFS_H_
 #define _RL_TYPEDEFS_H_
 
+#include <stdio.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif