remove RuntimeError from mrb_state

1 files changed, 1 insertions, 1 deletions

diff --git a/src/re.c b/src/re.c
index 70e7c59b6..b821d2e71 100644
--- a/src/re.c
+++ b/src/re.c
@@ -2143,7 +2143,7 @@ mrb_reg_regsub(mrb_state *mrb, mrb_value str, mrb_value src, struct re_registers
                 break;
             }
             else {
-                mrb_raise(mrb, mrb->eRuntimeError_class, "invalid group name reference format");
+                mrb_raise(mrb, E_RUNTIME_ERROR, "invalid group name reference format");
             }
         }