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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 4d95fe704e..e32bf82260 100644
--- a/internal.h
+++ b/internal.h
@@ -86,7 +86,7 @@ void ruby_debug_breakpoint(void);
PRINTF_ARGS(void ruby_debug_printf(const char*, ...), 1, 2);
// show obj data structure without any side-effect
-#define rp(obj) rb_obj_info_dump_loc((VALUE)(obj), __FILE__, __LINE__, __func__)
+#define rp(obj) rb_obj_info_dump_loc((VALUE)(obj), __FILE__, __LINE__, RUBY_FUNCTION_NAME_STRING)
// same as rp, but add message header
#define rp_m(msg, obj) do { \