diff --git a/gpu/src/Surface.zig b/gpu/src/Surface.zig
index e54e4520..3d524780 100644
--- a/gpu/src/Surface.zig
+++ b/gpu/src/Surface.zig
@@ -2,7 +2,8 @@
 
 const Surface = @This();
 
-// The type erased pointer to the Surface implementation
+/// The type erased pointer to the Surface implementation
+/// Equal to c.WGPUSurface for NativeInstance.
 ptr: *anyopaque,
 vtable: *const VTable,