diff --git a/vm_backtrace.c b/vm_backtrace.c
index be48326f3d..814dc1a345 100644
--- a/vm_backtrace.c
+++ b/vm_backtrace.c
@@ -800,7 +800,7 @@ backtrace_load_data(VALUE self, VALUE str)
}
/*
- * call-seq: Threade::Backtrace::limit -> integer
+ * call-seq: Thread::Backtrace::limit -> integer
*
* Returns maximum backtrace length set by --backtrace-limit
* command-line option. The defalt is -1 which means unlimited