diff --git a/src/engine.rs b/src/engine.rs
index f024d108..9d6bbd37 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -8,7 +8,7 @@ use std::{convert::TryInto, sync::Arc};
 
 use crate::any::{Any, AnyExt, Dynamic, Variant};
 use crate::call::FunArgs;
-use crate::fn_register::{RegisterBoxFn, RegisterFn};
+use crate::fn_register::{RegisterDynamicFn, RegisterFn};
 use crate::parser::{lex, parse, Expr, FnDef, ParseError, Stmt, AST};
 use fmt::{Debug, Display};
 
diff --git a/src/fn_register.rs b/src/fn_register.rs
index 72bf4a7e..2aab7623 100644
--- a/src/fn_register.rs
+++ b/src/fn_register.rs
@@ -6,7 +6,7 @@ use crate::engine::{Engine, EvalAltResult, FnCallArgs};
 pub trait RegisterFn<FN, ARGS, RET> {
     fn register_fn(&mut self, name: &str, f: FN);
 }
-pub trait RegisterBoxFn<FN, ARGS> {
+pub trait RegisterDynamicFn<FN, ARGS> {
     fn register_dynamic_fn(&mut self, name: &str, f: FN);
 }
 
@@ -57,7 +57,7 @@ macro_rules! def_register {
         impl<
             $($par: Any + Clone,)*
             FN: Fn($($param),*) -> Dynamic + 'static,
-        > RegisterBoxFn<FN, ($($mark,)*)> for Engine
+        > RegisterDynamicFn<FN, ($($mark,)*)> for Engine
         {
             fn register_dynamic_fn(&mut self, name: &str, f: FN) {
                 let fun = move |mut args: FnCallArgs| {
diff --git a/src/lib.rs b/src/lib.rs
index 841c56b2..c9302bed 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -47,5 +47,5 @@ mod parser;
 
 pub use any::Dynamic;
 pub use engine::{Array, Engine, EvalAltResult, Scope};
-pub use fn_register::{RegisterBoxFn, RegisterFn};
+pub use fn_register::{RegisterDynamicFn, RegisterFn};
 pub use parser::{ParseError, ParseErrorType, AST};