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-rw-r--r--ext/psych/psych.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/ext/psych/psych.c b/ext/psych/psych.c
index 0afd7318b5d..8af0bb6a5a2 100644
--- a/ext/psych/psych.c
+++ b/ext/psych/psych.c
@@ -22,6 +22,9 @@ VALUE mPsych;
void Init_psych(void)
{
+ #ifdef HAVE_RB_EXT_RACTOR_SAFE
+ RB_EXT_RACTOR_SAFE(true);
+ #endif
mPsych = rb_define_module("Psych");
rb_define_singleton_method(mPsych, "libyaml_version", libyaml_version, 0);