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-rw-r--r--include/ruby.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby.h b/include/ruby.h
index 31c1df3c5e..2775c11a40 100644
--- a/include/ruby.h
+++ b/include/ruby.h
@@ -14,6 +14,7 @@
#define HAVE_RUBY_DEBUG_H 1
#define HAVE_RUBY_DEFINES_H 1
#define HAVE_RUBY_ENCODING_H 1
+#define HAVE_RUBY_FIBER_SCHEDULER_H 1
#define HAVE_RUBY_INTERN_H 1
#define HAVE_RUBY_IO_H 1
#define HAVE_RUBY_MEMORY_VIEW_H 1