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-rw-r--r--ext/readline/readline.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index f6dc6b67ed8..bc2241007fd 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -5,6 +5,7 @@
#include RUBY_EXTCONF_H
#endif
+#include "config.h"
#include <errno.h>
#include <stdio.h>
#include <ctype.h>