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-rw-r--r--mrbgems/mruby-bin-mirb/tools/mirb/mirb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c b/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
index 8fe7634de..e73a1c14d 100644
--- a/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
+++ b/mrbgems/mruby-bin-mirb/tools/mirb/mirb.c
@@ -333,7 +333,7 @@ main(int argc, char **argv)
char last_code_line[1024] = { 0 };
#ifndef ENABLE_READLINE
int last_char;
- int char_index;
+ size_t char_index;
#else
char *history_path;
#endif