diff --git a/readline.c b/readline.c
index 7834af0f6b..92f9cd1569 100644
--- a/readline.c
+++ b/readline.c
@@ -28,6 +28,7 @@
 #define IS_ESC  1
 #define IS_CSI  2
 
+#undef printf
 #define printf do_not_use_printf
 
 void readline_show_prompt(ReadLineState *rs)