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-rw-r--r--ext/tk/tkutil/tkutil.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ext/tk/tkutil/tkutil.c b/ext/tk/tkutil/tkutil.c
index 88f1291006..318b2732d0 100644
--- a/ext/tk/tkutil/tkutil.c
+++ b/ext/tk/tkutil/tkutil.c
@@ -936,7 +936,8 @@ tk_conv_args(argc, argv, self)
VALUE *argv; /* [0]:base_array, [1]:enc_mode, [2]..[n]:args */
VALUE self;
{
- int idx, size;
+ int idx;
+ long size;
volatile VALUE dst;
int thr_crit_bup;
VALUE old_gc;