diff --git a/ext/-test-/time/leap_second.c b/ext/-test-/time/leap_second.c
new file mode 100644
index 0000000000..f24fcb670c
--- /dev/null
+++ b/ext/-test-/time/leap_second.c
@@ -0,0 +1,14 @@
+#include "ruby.h"
+
+static VALUE
+bug_time_s_reset_leap_second_info(VALUE klass)
+{
+    reset_leap_second_info();
+    return Qnil;
+}
+
+void
+Init_time_leap_second(VALUE klass)
+{
+    rb_define_singleton_method(klass, "reset_leap_second_info", bug_time_s_reset_leap_second_info, 0);
+}