diff --git a/src/reader.h b/src/reader.h
index 186b8567..c241344f 100644
--- a/src/reader.h
+++ b/src/reader.h
@@ -40,7 +40,6 @@ typedef struct gram_control_s
 /* From the scanner.  */
 extern FILE *gram_in;
 extern int gram__flex_debug;
-void scanner_last_string_free (void);
 void scanner_initialize (void);
 void scanner_free (void);