diff --git a/repl.c b/repl.c
index ac03cea..021a696 100644
--- a/repl.c
+++ b/repl.c
@@ -3,7 +3,7 @@
 #include <stdio.h>
 #include <string.h>
 
-#ifndef NO_READLINE
+#ifdef USE_READLINE
 #include <readline/readline.h>
 #include <readline/history.h>
 #else