diff --git a/src/gfxstream/guest/vulkan_enc/ResourceTracker.h b/src/gfxstream/guest/vulkan_enc/ResourceTracker.h
index 66a0a5bf83e..59db59b300e 100644
--- a/src/gfxstream/guest/vulkan_enc/ResourceTracker.h
+++ b/src/gfxstream/guest/vulkan_enc/ResourceTracker.h
@@ -48,8 +48,8 @@ public:
     using CleanupCallback = std::function<void()>;
 
     struct ThreadingCallbacks {
-        HostConnectionGetFunc hostConnectionGetFunc = 0;
-        VkEncoderGetFunc vkEncoderGetFunc = 0;
+        HostConnectionGetFunc hostConnectionGetFunc = nullptr;
+        VkEncoderGetFunc vkEncoderGetFunc = nullptr;
     };
 
     static uint32_t streamFeatureBits;