1 files changed, 1 insertions, 1 deletions
diff --git a/src/model/scope.rs b/src/model/scope.rs
index 1ab7032c..d21d0587 100644
--- a/src/model/scope.rs
+++ b/src/model/scope.rs
@@ -78,7 +78,7 @@ impl Scope {
     pub fn def_fn(
         &mut self,
         name: &'static str,
-        func: fn(&mut Vm, &mut Args) -> SourceResult<Value>,
+        func: fn(&Vm, &mut Args) -> SourceResult<Value>,
     ) {
         self.define(name, Func::from_fn(name, func));
     }