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-rw-r--r--include/ruby/ruby.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index f0d53b3e11..515a27aa0b 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1825,6 +1825,7 @@ int ruby_native_thread_p(void);
#define RUBY_EVENT_B_RETURN 0x0200
#define RUBY_EVENT_THREAD_BEGIN 0x0400
#define RUBY_EVENT_THREAD_END 0x0800
+#define RUBY_EVENT_FIBER_SWITCH 0x1000
#define RUBY_EVENT_TRACEPOINT_ALL 0xffff
/* special events */