diff --git a/src/dawn/utils/WGPUHelpers.h b/src/dawn/utils/WGPUHelpers.h
index 22773bffbb..67199fc295 100644
--- a/src/dawn/utils/WGPUHelpers.h
+++ b/src/dawn/utils/WGPUHelpers.h
@@ -43,13 +43,13 @@ namespace utils {
     }
 
     wgpu::ImageCopyBuffer CreateImageCopyBuffer(wgpu::Buffer buffer,
-                                                uint64_t offset,
-                                                uint32_t bytesPerRow,
+                                                uint64_t offset = 0,
+                                                uint32_t bytesPerRow = wgpu::kCopyStrideUndefined,
                                                 uint32_t rowsPerImage = wgpu::kCopyStrideUndefined);
     wgpu::ImageCopyTexture CreateImageCopyTexture(
         wgpu::Texture texture,
-        uint32_t level,
-        wgpu::Origin3D origin,
+        uint32_t level = 0,
+        wgpu::Origin3D origin = {0, 0, 0},
         wgpu::TextureAspect aspect = wgpu::TextureAspect::All);
     wgpu::TextureDataLayout CreateTextureDataLayout(
         uint64_t offset,