diff --git a/gpu/src/TODO b/gpu/src/TODO
index e914a113..81bce5eb 100644
--- a/gpu/src/TODO
+++ b/gpu/src/TODO
@@ -377,12 +377,6 @@ typedef struct WGPURenderPassTimestampWrite {
 
 
 
-typedef struct WGPUExtent3D {
-    uint32_t width;
-    uint32_t height;
-    uint32_t depthOrArrayLayers;
-} WGPUExtent3D;
-
 typedef struct WGPUOrigin3D {
     uint32_t x;
     uint32_t y;
diff --git a/gpu/src/structs.zig b/gpu/src/structs.zig
index a2f1353f..68c75299 100644
--- a/gpu/src/structs.zig
+++ b/gpu/src/structs.zig
@@ -43,3 +43,9 @@ pub const Color = extern struct {
     b: f64,
     a: f64,
 };
+
+pub const Extent3D = extern struct {
+    width: u32,
+    height: u32,
+    depth_or_array_layers: u32,
+};