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-rw-r--r--ext/bigdecimal/bigdecimal.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/ext/bigdecimal/bigdecimal.h b/ext/bigdecimal/bigdecimal.h
index e3eae06e67..28f3363b3c 100644
--- a/ext/bigdecimal/bigdecimal.h
+++ b/ext/bigdecimal/bigdecimal.h
@@ -159,6 +159,10 @@ rb_sym2str(VALUE sym)
# define vabs llabs
#endif
+#if !defined(HAVE_RB_CATEGORY_WARN) || !defined(HAVE_CONST_RB_WARN_CATEGORY_DEPRECATED)
+# define rb_category_warn(category, ...) rb_warn(__VA_ARGS__)
+#endif
+
extern VALUE rb_cBigDecimal;
#if 0 || SIZEOF_BDIGITS >= 16