--- embedaddon/readline/examples/hist_erasedups.c	2014/07/30 08:16:46	1.1.1.1
+++ embedaddon/readline/examples/hist_erasedups.c	2021/03/17 01:01:01	1.1.1.2
@@ -38,8 +38,8 @@
 #define STREQN(a, b, n) ((n == 0) ? (1) \
                                   : ((a)[0] == (b)[0] && strncmp(a, b, n) == 0))
 
-extern int history_offset;
-                                  
+int hist_erasedups (void);
+
 static void
 usage()
 {