diff --git a/src/lisp/plat/plat.h b/src/lisp/plat/plat.h
index 1c4216a..bcd5b1a 100644
--- a/src/lisp/plat/plat.h
+++ b/src/lisp/plat/plat.h
@@ -18,4 +18,7 @@
 extern ssize_t readlink(const char *pathname, char *buf, size_t buf_size);
 bool file_exists(const char *path);
 
+char *read_input_line(char *prompt);
+void add_line_to_history(char *line);
+
 #define THREAD_LOCAL