diff --git a/examples/no_std.rs b/examples/no_std.rs
index 9f51f586..32cf14a2 100644
--- a/examples/no_std.rs
+++ b/examples/no_std.rs
@@ -7,7 +7,11 @@ fn main() -> Result<(), EvalAltResult> {
 
     let result = engine.eval::<INT>("40 + 2")?;
 
-    println!("Answer: {}", 42);
+    #[cfg(not(feature = "no_std"))]
+    println!("Answer: {}", result);
+
+    #[cfg(feature = "no_std")]
+    assert_eq!(result, 42);
 
     Ok(())
 }
diff --git a/src/api.rs b/src/api.rs
index 208f311c..ef1b0091 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -177,7 +177,7 @@ impl<'e> Engine<'e> {
         name: &str,
         callback: impl Fn(&mut T) -> U + 'static,
     ) {
-        let get_fn_name = format!("{}{}", FUNC_GETTER, name);
+        let get_fn_name = FUNC_GETTER.to_string() + name;
         self.register_fn(&get_fn_name, callback);
     }
 
@@ -219,7 +219,7 @@ impl<'e> Engine<'e> {
         name: &str,
         callback: impl Fn(&mut T, U) -> () + 'static,
     ) {
-        let set_fn_name = format!("{}{}", FUNC_SETTER, name);
+        let set_fn_name = FUNC_SETTER.to_string() + name;
         self.register_fn(&set_fn_name, callback);
     }