1 files changed, 4 insertions, 1 deletions
diff --git a/error.c b/error.c
index e364084bc0..6f958aa2d0 100644
--- a/error.c
+++ b/error.c
@@ -479,10 +479,13 @@ set_syserr(n, name)
     VALUE error;
 
     if (!st_lookup(syserr_tbl, n, &error)) {
-	error = rb_define_class_under(rb_mErrno, name, rb_eSystemCallError);;
+	error = rb_define_class_under(rb_mErrno, name, rb_eSystemCallError);
 	rb_define_const(error, "Errno", INT2NUM(n));
 	st_add_direct(syserr_tbl, n, error);
     }
+    else {
+	rb_define_const(rb_mErrno, name, error);
+    }
     return error;
 }