diff --git a/src/dawn/native/DynamicUploader.cpp b/src/dawn/native/DynamicUploader.cpp
index 262c07d718..56ef735e08 100644
--- a/src/dawn/native/DynamicUploader.cpp
+++ b/src/dawn/native/DynamicUploader.cpp
@@ -19,8 +19,8 @@
 namespace dawn::native {
 
     DynamicUploader::DynamicUploader(DeviceBase* device) : mDevice(device) {
-        mRingBuffers.emplace_back(
-            std::unique_ptr<RingBuffer>(new RingBuffer{nullptr, {kRingBufferSize}}));
+        mRingBuffers.emplace_back(std::unique_ptr<RingBuffer>(
+            new RingBuffer{nullptr, RingBufferAllocator(kRingBufferSize)}));
     }
 
     void DynamicUploader::ReleaseStagingBuffer(std::unique_ptr<StagingBufferBase> stagingBuffer) {
@@ -66,8 +66,8 @@ namespace dawn::native {
         // Upon failure, append a newly created ring buffer to fulfill the
         // request.
         if (startOffset == RingBufferAllocator::kInvalidOffset) {
-            mRingBuffers.emplace_back(
-                std::unique_ptr<RingBuffer>(new RingBuffer{nullptr, {kRingBufferSize}}));
+            mRingBuffers.emplace_back(std::unique_ptr<RingBuffer>(
+                new RingBuffer{nullptr, RingBufferAllocator(kRingBufferSize)}));
 
             targetRingBuffer = mRingBuffers.back().get();
             startOffset = targetRingBuffer->mAllocator.Allocate(allocationSize, serial);
diff --git a/src/dawn/native/RingBufferAllocator.h b/src/dawn/native/RingBufferAllocator.h
index 27f7622449..569521c8a0 100644
--- a/src/dawn/native/RingBufferAllocator.h
+++ b/src/dawn/native/RingBufferAllocator.h
@@ -27,7 +27,7 @@ namespace dawn::native {
     class RingBufferAllocator {
       public:
         RingBufferAllocator() = default;
-        RingBufferAllocator(uint64_t maxSize);
+        explicit RingBufferAllocator(uint64_t maxSize);
         ~RingBufferAllocator() = default;
         RingBufferAllocator(const RingBufferAllocator&) = default;
         RingBufferAllocator& operator=(const RingBufferAllocator&) = default;