diff --git a/.changeset/proud-carrots-grab.md b/.changeset/proud-carrots-grab.md
new file mode 100644
index 00000000000..8f1f62312b0
--- /dev/null
+++ b/.changeset/proud-carrots-grab.md
@@ -0,0 +1,5 @@
+---
+'@builder.io/qwik': patch
+---
+
+Fix: add subscription when doing `"prop" in store`
diff --git a/packages/qwik/src/core/state/store.ts b/packages/qwik/src/core/state/store.ts
index e5db4c72bec..08d9050740a 100644
--- a/packages/qwik/src/core/state/store.ts
+++ b/packages/qwik/src/core/state/store.ts
@@ -192,15 +192,23 @@ export class ReadWriteProxyHandler implements ProxyHandler<TargetType> {
     return true;
   }
 
-  has(target: TargetType, property: string | symbol): boolean {
-    if (property === QOjectTargetSymbol) {
+  has(target: TargetType, prop: string | symbol): boolean {
+    if (prop === QOjectTargetSymbol) {
       return true;
     }
+    const invokeCtx = tryGetInvokeContext();
+    if (typeof prop === 'string' && invokeCtx) {
+      const subscriber = invokeCtx.$subscriber$;
+      if (subscriber) {
+        const isA = isArray(target);
+        this.$manager$.$addSub$(subscriber, isA ? undefined : prop);
+      }
+    }
     const hasOwnProperty = Object.prototype.hasOwnProperty;
-    if (hasOwnProperty.call(target, property)) {
+    if (hasOwnProperty.call(target, prop)) {
       return true;
     }
-    if (typeof property === 'string' && hasOwnProperty.call(target, _IMMUTABLE_PREFIX + property)) {
+    if (typeof prop === 'string' && hasOwnProperty.call(target, _IMMUTABLE_PREFIX + prop)) {
       return true;
     }
     return false;