diff --git a/demos/combustion_demo/src/vr_controller_interaction_behavior.hpp b/demos/combustion_demo/src/vr_controller_interaction_behavior.hpp
index 08601b9e36c7de13e35a847aafbb06790ed40310..6ed6f309f1cb452e1e330c06ea634ae5ed5c516b 100644
--- a/demos/combustion_demo/src/vr_controller_interaction_behavior.hpp
+++ b/demos/combustion_demo/src/vr_controller_interaction_behavior.hpp
@@ -52,7 +52,7 @@ class VRControllerInteractionBehavior : public phx::Behavior {
  private:
   phx::Transform* target_ = nullptr;
   bool is_grabbed_ = false;
-  int release_delay_;
+  int release_delay_ = 0;
 };
 
 #endif  // DEMOS_COMBUSTION_DEMO_SRC_VR_CONTROLLER_INTERACTION_BEHAVIOR_HPP_