diff --git a/gpu/TODO-webgpu.h b/gpu/TODO-webgpu.h
index 54f4d694..34a95cc9 100644
--- a/gpu/TODO-webgpu.h
+++ b/gpu/TODO-webgpu.h
@@ -1,12 +1,3 @@
-#define WGPU_ARRAY_LAYER_COUNT_UNDEFINED (0xffffffffUL)
-#define WGPU_COPY_STRIDE_UNDEFINED (0xffffffffUL)
-#define WGPU_LIMIT_U32_UNDEFINED (0xffffffffUL)
-#define WGPU_LIMIT_U64_UNDEFINED (0xffffffffffffffffULL)
-#define WGPU_MIP_LEVEL_COUNT_UNDEFINED (0xffffffffUL)
-#define WGPU_STRIDE_UNDEFINED (0xffffffffUL)
-#define WGPU_WHOLE_MAP_SIZE SIZE_MAX
-#define WGPU_WHOLE_SIZE (0xffffffffffffffffULL)
-
 typedef uint32_t WGPUFlags;
 
 typedef struct WGPUAdapterImpl* WGPUAdapter;
diff --git a/gpu/src/main.zig b/gpu/src/main.zig
new file mode 100644
index 00000000..94e2c133
--- /dev/null
+++ b/gpu/src/main.zig
@@ -0,0 +1,10 @@
+const std = @import("std");
+
+pub const array_layer_count_undefined = 0xffffffff;
+pub const copy_stride_undefined = 0xffffffff;
+pub const limit_u32_undefined = 0xffffffff;
+pub const limit_u64_undefined = 0xffffffffffffffff;
+pub const mip_level_count_undefined = 0xffffffff;
+pub const stride_undefined = 0xffffffff;
+pub const whole_map_size = std.math.maxInt(usize);
+pub const whole_size = 0xffffffffffffffff;