diff --git a/crates/aiken-lang/src/tipo/pattern.rs b/crates/aiken-lang/src/tipo/pattern.rs
index 3fb595c3..a8b055fe 100644
--- a/crates/aiken-lang/src/tipo/pattern.rs
+++ b/crates/aiken-lang/src/tipo/pattern.rs
@@ -141,11 +141,11 @@ impl<'a, 'b> PatternTyper<'a, 'b> {
         pattern: UntypedPattern,
         tipo: Rc<Type>,
         ann_type: Option<Rc<Type>>,
-        is_assignment: bool,
+        is_let: bool,
     ) -> Result<TypedPattern, Error> {
         match pattern {
             Pattern::Discard { name, location } => {
-                if is_assignment {
+                if is_let {
                     // Register declaration for the unused variable detection
                     self.environment
                         .warnings