diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c index e27186f694..4041537d25 100644 --- a/ext/stringio/stringio.c +++ b/ext/stringio/stringio.c @@ -1866,7 +1866,7 @@ strio_set_encoding(int argc, VALUE *argv, VALUE self) } ptr->enc = enc; if (!NIL_P(ptr->string) && WRITABLE(self) -#if RUBY_API_VERSION_MAJOR == 3 || RUBY_API_VERSION_MAJOR >= 4 +#if (RUBY_API_VERSION_MAJOR == 3 && RUBY_API_VERSION_MINOR >= 4) || RUBY_API_VERSION_MAJOR >= 4 // Do not attempt to modify chilled strings on Ruby 3.4+ && !FL_TEST_RAW(ptr->string, RUBY_FL_USER2 | RUBY_FL_USER3) #endif