diff --git a/gpu/src/adapter.zig b/gpu/src/adapter.zig
index c86e661d..603a632a 100644
--- a/gpu/src/adapter.zig
+++ b/gpu/src/adapter.zig
@@ -5,6 +5,7 @@ const DeviceDescriptor = @import("device.zig").DeviceDescriptor;
 const FeatureName = @import("types.zig").FeatureName;
 const SupportedLimits = @import("types.zig").SupportedLimits;
 const RequestDeviceStatus = @import("types.zig").RequestDeviceStatus;
+const RequestDeviceCallback = @import("callbacks.zig").RequestDeviceCallback;
 const Impl = @import("interface.zig").Impl;
 
 pub const Adapter = opaque {
@@ -70,13 +71,6 @@ pub const Adapter = opaque {
     }
 };
 
-pub const RequestDeviceCallback = fn (
-    status: RequestDeviceStatus,
-    device: *Device,
-    message: ?[*:0]const u8,
-    userdata: *anyopaque,
-) callconv(.C) void;
-
 test "Adapter.Type name" {
     try testing.expectEqualStrings("Discrete GPU", Adapter.Type.discrete_gpu.name());
 }
diff --git a/gpu/src/callbacks.zig b/gpu/src/callbacks.zig
new file mode 100644
index 00000000..f9983f51
--- /dev/null
+++ b/gpu/src/callbacks.zig
@@ -0,0 +1,57 @@
+const CompilationInfoRequestStatus = @import("types.zig").CompilationInfoRequestStatus;
+const CompilationInfo = @import("types.zig").CompilationInfo;
+const ErrorType = @import("types.zig").ErrorType;
+const LoggingType = @import("types.zig").LoggingType;
+const RequestDeviceStatus = @import("types.zig").RequestDeviceStatus;
+const RequestAdapterStatus = @import("types.zig").RequestAdapterStatus;
+const CreatePipelineAsyncStatus = @import("types.zig").CreatePipelineAsyncStatus;
+const Device = @import("device.zig").Device;
+const Adapter = @import("adapter.zig").Adapter;
+const ComputePipeline = @import("compute_pipeline.zig").ComputePipeline;
+const RenderPipeline = @import("render_pipeline.zig").RenderPipeline;
+
+pub const CompilationInfoCallback = fn (
+    status: CompilationInfoRequestStatus,
+    compilation_info: *const CompilationInfo,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
+pub const ErrorCallback = fn (
+    typ: ErrorType,
+    message: [*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
+pub const LoggingCallback = fn (
+    typ: LoggingType,
+    message: [*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
+pub const RequestDeviceCallback = fn (
+    status: RequestDeviceStatus,
+    device: *Device,
+    message: ?[*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
+pub const RequestAdapterCallback = fn (
+    status: RequestAdapterStatus,
+    adapter: *Adapter,
+    message: ?[*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
+pub const CreateComputePipelineAsyncCallback = fn (
+    status: CreatePipelineAsyncStatus,
+    compute_pipeline: *ComputePipeline,
+    message: [*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
+
+pub const CreateRenderPipelineAsyncCallback = fn (
+    status: CreatePipelineAsyncStatus,
+    pipeline: *RenderPipeline,
+    message: [*:0]const u8,
+    userdata: *anyopaque,
+) callconv(.C) void;
diff --git a/gpu/src/device.zig b/gpu/src/device.zig
index fa476065..19ce7da5 100644
--- a/gpu/src/device.zig
+++ b/gpu/src/device.zig
@@ -34,10 +34,10 @@ const RequiredLimits = @import("types.zig").RequiredLimits;
 const SupportedLimits = @import("types.zig").SupportedLimits;
 const ErrorType = @import("types.zig").ErrorType;
 const ErrorFilter = @import("types.zig").ErrorFilter;
-const ErrorCallback = @import("types.zig").ErrorCallback;
-const LoggingCallback = @import("types.zig").LoggingCallback;
-const CreateComputePipelineAsyncCallback = @import("main.zig").CreateComputePipelineAsyncCallback;
-const CreateRenderPipelineAsyncCallback = @import("main.zig").CreateRenderPipelineAsyncCallback;
+const LoggingCallback = @import("callbacks.zig").LoggingCallback;
+const ErrorCallback = @import("callbacks.zig").ErrorCallback;
+const CreateComputePipelineAsyncCallback = @import("callbacks.zig").CreateComputePipelineAsyncCallback;
+const CreateRenderPipelineAsyncCallback = @import("callbacks.zig").CreateRenderPipelineAsyncCallback;
 const Impl = @import("interface.zig").Impl;
 
 pub const Device = opaque {
diff --git a/gpu/src/instance.zig b/gpu/src/instance.zig
index 8c6ace3c..466a182e 100644
--- a/gpu/src/instance.zig
+++ b/gpu/src/instance.zig
@@ -4,6 +4,7 @@ const Surface = @import("surface.zig").Surface;
 const SurfaceDescriptor = @import("surface.zig").SurfaceDescriptor;
 const Adapter = @import("adapter.zig").Adapter;
 const RequestAdapterOptions = @import("main.zig").RequestAdapterOptions;
+const RequestAdapterCallback = @import("callbacks.zig").RequestAdapterCallback;
 const Impl = @import("interface.zig").Impl;
 
 pub const Instance = opaque {
@@ -27,10 +28,3 @@ pub const Instance = opaque {
         Impl.instanceRelease(instance);
     }
 };
-
-pub const RequestAdapterCallback = fn (
-    status: RequestAdapterStatus,
-    adapter: *Adapter,
-    message: ?[*:0]const u8,
-    userdata: *anyopaque,
-) callconv(.C) void;
diff --git a/gpu/src/main.zig b/gpu/src/main.zig
index 2007fafc..f22665af 100644
--- a/gpu/src/main.zig
+++ b/gpu/src/main.zig
@@ -12,6 +12,7 @@ pub usingnamespace @import("adapter.zig");
 pub usingnamespace @import("bind_group.zig");
 pub usingnamespace @import("bind_group_layout.zig");
 pub usingnamespace @import("buffer.zig");
+pub usingnamespace @import("callbacks.zig");
 pub usingnamespace @import("command_buffer.zig");
 pub usingnamespace @import("command_encoder.zig");
 pub usingnamespace @import("compute_pass_encoder.zig");
@@ -52,20 +53,6 @@ const interface = @import("interface.zig");
 /// cast to a `fn (...) callconv(.C) T` before use.
 pub const Proc = *anyopaque;
 
-pub const CreateComputePipelineAsyncCallback = fn (
-    status: types.CreatePipelineAsyncStatus,
-    compute_pipeline: *compute_pipeline.ComputePipeline,
-    message: [*:0]const u8,
-    userdata: *anyopaque,
-) callconv(.C) void;
-
-pub const CreateRenderPipelineAsyncCallback = fn (
-    status: types.CreatePipelineAsyncStatus,
-    pipeline: *render_pipeline.RenderPipeline,
-    message: [*:0]const u8,
-    userdata: *anyopaque,
-) callconv(.C) void;
-
 pub const ComputePassTimestampWrite = extern struct {
     query_set: *query_set.QuerySet,
     query_index: u32,
diff --git a/gpu/src/shader_module.zig b/gpu/src/shader_module.zig
index 7d59697a..8f334050 100644
--- a/gpu/src/shader_module.zig
+++ b/gpu/src/shader_module.zig
@@ -1,5 +1,5 @@
 const ChainedStruct = @import("types.zig").ChainedStruct;
-const CompilationInfoCallback = @import("types.zig").CompilationInfoCallback;
+const CompilationInfoCallback = @import("callbacks.zig").CompilationInfoCallback;
 const Impl = @import("interface.zig").Impl;
 
 pub const ShaderModule = opaque {
diff --git a/gpu/src/types.zig b/gpu/src/types.zig
index f0a49fe5..049f5920 100644
--- a/gpu/src/types.zig
+++ b/gpu/src/types.zig
@@ -11,24 +11,6 @@ const ShaderModule = @import("shader_module.zig").ShaderModule;
 const limit_u32_undefined = @import("main.zig").limit_u32_undefined;
 const limit_u64_undefined = @import("main.zig").limit_u64_undefined;
 
-pub const CompilationInfoCallback = fn (
-    status: CompilationInfoRequestStatus,
-    compilation_info: *const CompilationInfo,
-    userdata: *anyopaque,
-) callconv(.C) void;
-
-pub const ErrorCallback = fn (
-    typ: ErrorType,
-    message: [*:0]const u8,
-    userdata: *anyopaque,
-) callconv(.C) void;
-
-pub const LoggingCallback = fn (
-    typ: LoggingType,
-    message: [*:0]const u8,
-    userdata: *anyopaque,
-) callconv(.C) void;
-
 pub const AlphaMode = enum(u32) {
     premultiplied = 0x00000000,
     unpremultiplied = 0x00000001,