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-rw-r--r--ext/readline/readline.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index fc17dad4f1..bc98df92f6 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -3,7 +3,9 @@
#include <errno.h>
#include <stdio.h>
+#ifdef HAVE_UNISTD_H
#include <unistd.h>
+#endif
#include <readline/readline.h>
#include <readline/history.h>