diff --git a/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk.cc b/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk.cc
index a9a42ad35a5..d75db4942bb 100644
--- a/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk.cc
+++ b/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk.cc
@@ -119,11 +119,9 @@ size_t ContextVK::ChooseThreadCountForWorkers(size_t hardware_concurrency) {
 }
 
 namespace {
-thread_local uint64_t tls_context_count = 0;
+std::atomic_uint64_t context_count = 0;
 uint64_t CalculateHash(void* ptr) {
-  // You could make a context once per nanosecond for 584 years on one thread
-  // before this overflows.
-  return ++tls_context_count;
+  return context_count.fetch_add(1);
 }
 }  // namespace
 
diff --git a/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk_unittests.cc b/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk_unittests.cc
index 3de93ec63e5..61c0d2bee16 100644
--- a/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk_unittests.cc
+++ b/engine/src/flutter/impeller/renderer/backend/vulkan/context_vk_unittests.cc
@@ -392,5 +392,21 @@ TEST(ContextVKTest, AHBSwapchainCapabilitiesCanBeMissing) {
 
 }  // namespace impeller
 
+TEST(ContextVKTest, HashIsUniqueAcrossThreads) {
+  uint64_t hash1, hash2;
+  std::thread thread1([&]() {
+    auto context = MockVulkanContextBuilder().Build();
+    hash1 = context->GetHash();
+  });
+  std::thread thread2([&]() {
+    auto context = MockVulkanContextBuilder().Build();
+    hash2 = context->GetHash();
+  });
+  thread1.join();
+  thread2.join();
+
+  EXPECT_NE(hash1, hash2);
+}
+
 }  // namespace testing
 }  // namespace impeller