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-rw-r--r--ext/readline/readline.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index 08b61fef9d..502e73e5c8 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -48,7 +48,7 @@ static VALUE mReadline;
#define EDIT_LINE_LIBRARY_VERSION "EditLine wrapper"
#ifndef USE_INSERT_IGNORE_ESCAPE
-# if !defined(HAVE_EDITLINE_READLINE_H) && defined(HAVE_RL_PROMPT_START_IGNORE) && defined(HAVE_RL_PROMPT_END_IGNORE)
+# if !defined(HAVE_EDITLINE_READLINE_H) && defined(RL_PROMPT_START_IGNORE) && defined(RL_PROMPT_END_IGNORE)
# define USE_INSERT_IGNORE_ESCAPE 1
# else
# define USE_INSERT_IGNORE_ESCAPE 0