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-rw-r--r--src/pool.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/pool.c b/src/pool.c
index 77ac8a69f..c992b5e53 100644
--- a/src/pool.c
+++ b/src/pool.c
@@ -171,7 +171,7 @@ mrb_pool_realloc(mrb_pool *pool, void *p, size_t oldlen, size_t newlen)
#ifdef TEST_POOL
int
-main()
+main(void)
{
int i, len = 250;
mrb_pool *pool;