diff --git a/Modules/readline.c b/Modules/readline.c
index 26dfffbfaa9..f6b52a07412 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -1103,8 +1103,6 @@ rlhandler(char *text)
     rl_callback_handler_remove();
 }
 
-extern PyThreadState* _PyOS_ReadlineTState;
-
 static char *
 readline_until_enter_or_signal(const char *prompt, int *signal)
 {