1 files changed, 1 insertions, 1 deletions
diff --git a/eval.c b/eval.c
index 0312292a..bc58d303 100644
--- a/eval.c
+++ b/eval.c
@@ -5691,7 +5691,7 @@ void eval_init(void)
   reg_fun(intern(lit("-"), user_package), func_n1v(minusv));
   reg_fun(intern(lit("*"), user_package), func_n0v(mulv));
   reg_fun(intern(lit("abs"), user_package), func_n1(abso));
-  reg_fun(intern(lit("trunc"), user_package), func_n2(trunc));
+  reg_fun(intern(lit("trunc"), user_package), func_n2o(trunc, 1));
   reg_fun(intern(lit("mod"), user_package), func_n2(mod));
   reg_fun(intern(lit("trunc-rem"), user_package), func_n2(trunc_rem));
   reg_fun(intern(lit("wrap"), user_package), func_n3(wrap));