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-rw-r--r--internal.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 8c116f85d7..00a8295295 100644
--- a/internal.h
+++ b/internal.h
@@ -104,5 +104,6 @@ RUBY_SYMBOL_EXPORT_END
#define bp() ruby_debug_breakpoint()
#define RBOOL(v) ((v) ? Qtrue : Qfalse)
+#define RB_BIGNUM_TYPE_P(x) RB_TYPE_P((x), T_BIGNUM)
#endif /* RUBY_INTERNAL_H */