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-rw-r--r--internal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/internal.h b/internal.h
index 50c1691c38..993b0266ed 100644
--- a/internal.h
+++ b/internal.h
@@ -887,7 +887,7 @@ struct vm_throw_data {
VALUE throw_state;
};
-#define THROW_DATA_P(err) RB_TYPE_P(((VALUE)err), T_IMEMO)
+#define THROW_DATA_P(err) RB_TYPE_P((VALUE)(err), T_IMEMO)
/* IFUNC */