1 files changed, 1 insertions, 1 deletions
diff --git a/thread.c b/thread.c
index 9314cd5499..7be2a5f9f5 100644
--- a/thread.c
+++ b/thread.c
@@ -888,7 +888,7 @@ thread_s_new(int argc, VALUE *argv, VALUE klass)
     rb_obj_call_init_kw(thread, argc, argv, RB_PASS_CALLED_KEYWORDS);
     th = rb_thread_ptr(thread);
     if (!threadptr_initialized(th)) {
-        rb_raise(rb_eThreadError, "uninitialized thread - check `%"PRIsVALUE"#initialize'",
+        rb_raise(rb_eThreadError, "uninitialized thread - check '%"PRIsVALUE"#initialize'",
                  klass);
     }
     return thread;