diff --git a/examples/custom_types.rs b/examples/custom_types.rs
index eb84992e..3fa7c7ef 100644
--- a/examples/custom_types.rs
+++ b/examples/custom_types.rs
@@ -49,7 +49,7 @@ fn main() -> Result<(), Box<EvalAltResult>> {
                 .with_fn("new_ts", Self::new)
                 .with_fn("update", Self::update)
                 .with_fn("calc", Self::calculate)
-                .with_iterator()
+                .is_iterable()
                 .with_get_set("x", Self::get_x, Self::set_x);
         }
     }
diff --git a/src/api/build_type.rs b/src/api/build_type.rs
index e26c85bc..23199b0b 100644
--- a/src/api/build_type.rs
+++ b/src/api/build_type.rs
@@ -154,7 +154,7 @@ where
     /// Register a type iterator.
     /// This is an advanced API.
     #[inline(always)]
-    pub fn with_iterator(&mut self) -> &mut Self {
+    pub fn is_iterable(&mut self) -> &mut Self {
         self.engine.register_iterator::<T>();
         self
     }
diff --git a/tests/build_type.rs b/tests/build_type.rs
index c4f2c3bd..6d21bb9d 100644
--- a/tests/build_type.rs
+++ b/tests/build_type.rs
@@ -58,8 +58,9 @@ fn build_type() -> Result<(), Box<EvalAltResult>> {
         fn build(mut builder: TypeBuilder<Self>) {
             builder
                 .with_name("Vec3")
+                .is_iterable()
                 .with_fn("vec3", Self::new)
-                .with_iterator()
+                .is_iterable()
                 .with_get_set("x", Self::get_x, Self::set_x)
                 .with_get_set("y", Self::get_y, Self::set_y)
                 .with_get_set("z", Self::get_z, Self::set_z);
@@ -127,6 +128,19 @@ fn build_type() -> Result<(), Box<EvalAltResult>> {
         )?,
         Vec3::new(5, 6, 7),
     );
+    assert_eq!(
+        engine.eval::<INT>(
+            "
+                let sum = 0;
+                let v = vec3(1, 2, 3);
+                for i in v {
+                    sum += i;
+                }
+                sum
+            ",
+        )?,
+        6,
+    );
 
     Ok(())
 }