1 files changed, 1 insertions, 0 deletions
diff --git a/enum.c b/enum.c
index 867eec8f81..89bbd5079d 100644
--- a/enum.c
+++ b/enum.c
@@ -1021,6 +1021,7 @@ enum_tally(VALUE obj)
     return enum_hashify(obj, 0, 0, tally_i);
 }
 
+NORETURN(static VALUE first_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, params)));
 static VALUE
 first_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, params))
 {