diff --git a/boa_engine/src/builtins/bigint/mod.rs b/boa_engine/src/builtins/bigint/mod.rs
index aacdb67480..2d2ac22aec 100644
--- a/boa_engine/src/builtins/bigint/mod.rs
+++ b/boa_engine/src/builtins/bigint/mod.rs
@@ -98,8 +98,8 @@ impl BuiltInConstructor for BigInt {
             return Self::number_to_bigint(number);
         }
 
-        // 4. Otherwise, return ? ToBigInt(value).
-        Ok(value.to_bigint(context)?.into())
+        // 4. Otherwise, return ? ToBigInt(prim).
+        Ok(prim.to_bigint(context)?.into())
     }
 }