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-rw-r--r--Lib/ruby/rubyhead.swg3
1 files changed, 3 insertions, 0 deletions
diff --git a/Lib/ruby/rubyhead.swg b/Lib/ruby/rubyhead.swg
index 9960087c6..90f07cf68 100644
--- a/Lib/ruby/rubyhead.swg
+++ b/Lib/ruby/rubyhead.swg
@@ -91,6 +91,9 @@
#ifndef RSTRUCT_PTR
# define RSTRUCT_PTR(x) RSTRUCT(x)->ptr
#endif
+#ifndef RTYPEDDATA_P
+# define RTYPEDDATA_P(x) (TYPE(x) != T_DATA)
+#endif