1 files changed, 1 insertions, 0 deletions
diff --git a/ruby.h b/ruby.h
index 68e2ce5791..e92f63039c 100644
--- a/ruby.h
+++ b/ruby.h
@@ -645,6 +645,7 @@ RUBY_EXTERN VALUE rb_eIOError;
 RUBY_EXTERN VALUE rb_eRuntimeError;
 RUBY_EXTERN VALUE rb_eSecurityError;
 RUBY_EXTERN VALUE rb_eSystemCallError;
+RUBY_EXTERN VALUE rb_eThreadError;
 RUBY_EXTERN VALUE rb_eTypeError;
 RUBY_EXTERN VALUE rb_eZeroDivError;
 RUBY_EXTERN VALUE rb_eNotImpError;