diff --git a/include/cyclone/runtime.h b/include/cyclone/runtime.h
index b6ce741b..f81cd9cd 100644
--- a/include/cyclone/runtime.h
+++ b/include/cyclone/runtime.h
@@ -149,7 +149,6 @@ object Cyc_eq(object x, object y);
 object Cyc_set_car(void *, object l, object val) ;
 object Cyc_set_cdr(void *, object l, object val) ;
 object Cyc_length(void *d, object l);
-object Cyc_length2(void *d, object l);
 integer_type Cyc_length_as_object(void *d, object l);
 object Cyc_vector_length(void *data, object v);
 object Cyc_vector_ref(void *d, object v, object k);
diff --git a/runtime.c b/runtime.c
index f36279f4..4f178cb7 100644
--- a/runtime.c
+++ b/runtime.c
@@ -1007,8 +1007,6 @@ object Cyc_length(void *data, object l){
     }
     return obj_int2obj(len);
 }
-object Cyc_length2(void *data, object l){
-  return Cyc_length(data, l); }
 
 object Cyc_number2string(void *data, object cont, object n) {
     char buffer[1024];