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-rw-r--r--src/variable.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/variable.c b/src/variable.c
index 0bc1f0de1..870c96a6a 100644
--- a/src/variable.c
+++ b/src/variable.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
#include "mruby.h"
#include "mruby/class.h"
#include "ritehash.h"