diff --git a/src/client/stores/CalculationStore/Effects/reactions/otherReactions.ts b/src/client/stores/CalculationStore/Effects/reactions/otherReactions.ts
index dc46991..7e8613f 100644
--- a/src/client/stores/CalculationStore/Effects/reactions/otherReactions.ts
+++ b/src/client/stores/CalculationStore/Effects/reactions/otherReactions.ts
@@ -1475,6 +1475,13 @@ const reactionEffects: IReactionEffect[] = [
     },
   }),
 
+  calculationStore => ({
+    expression: () => calculationStore.getValue('leaseObjectType'),
+    effect: leaseObjectType => {
+      !leaseObjectType && calculationStore.setValue('brand', null);
+    },
+  }),
+
   calculationStore => ({
     expression: () => {
       return {