diff --git a/gpu/src/adapter.zig b/gpu/src/adapter.zig
index 2ffd594d..87de1222 100644
--- a/gpu/src/adapter.zig
+++ b/gpu/src/adapter.zig
@@ -88,7 +88,7 @@ pub const Adapter = opaque {
                     status,
                     device,
                     message,
-                    if (Context == void) {} else @ptrCast(Context, userdata),
+                    if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)),
                 );
             }
         };
diff --git a/gpu/src/buffer.zig b/gpu/src/buffer.zig
index 0c9fe066..3edad7bf 100644
--- a/gpu/src/buffer.zig
+++ b/gpu/src/buffer.zig
@@ -100,7 +100,7 @@ pub const Buffer = opaque {
         const Context = @TypeOf(context);
         const Helper = struct {
             pub fn callback(status: MapAsyncStatus, userdata: ?*anyopaque) callconv(.C) void {
-                callback(status, if (Context == void) {} else @ptrCast(Context, userdata));
+                callback(status, if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)));
             }
         };
         Impl.bufferMapAsync(buffer, mode, offset, size, Helper.callback, if (Context == void) null else context);
diff --git a/gpu/src/device.zig b/gpu/src/device.zig
index 6dd9f45d..7e5e28ed 100644
--- a/gpu/src/device.zig
+++ b/gpu/src/device.zig
@@ -92,7 +92,7 @@ pub const Device = opaque {
                     status,
                     compute_pipeline,
                     message,
-                    if (Context == void) {} else @ptrCast(Context, userdata),
+                    if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)),
                 );
             }
         };
@@ -150,7 +150,7 @@ pub const Device = opaque {
                     status,
                     pipeline,
                     message,
-                    if (Context == void) {} else @ptrCast(Context, userdata),
+                    if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)),
                 );
             }
         };
@@ -209,7 +209,7 @@ pub const Device = opaque {
         const Context = @TypeOf(context);
         const Helper = struct {
             pub fn callback(typ: ErrorType, message: [*:0]const u8, userdata: ?*anyopaque) callconv(.C) void {
-                callback(typ, message, if (Context == void) {} else @ptrCast(Context, userdata));
+                callback(typ, message, if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)));
             }
         };
         return Impl.devicePopErrorScope(device, Helper.callback, if (Context == void) null else context);
@@ -228,7 +228,7 @@ pub const Device = opaque {
         const Context = @TypeOf(context);
         const Helper = struct {
             pub fn callback(reason: LostReason, message: [*:0]const u8, userdata: ?*anyopaque) callconv(.C) void {
-                callback(reason, message, if (Context == void) {} else @ptrCast(Context, userdata));
+                callback(reason, message, if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)));
             }
         };
         Impl.deviceSetDeviceLostCallback(device, Helper.callback, if (Context == void) null else context);
@@ -247,7 +247,7 @@ pub const Device = opaque {
         const Context = @TypeOf(context);
         const Helper = struct {
             pub fn callback(typ: LoggingType, message: [*:0]const u8, userdata: ?*anyopaque) callconv(.C) void {
-                callback(typ, message, if (Context == void) {} else @ptrCast(Context, userdata));
+                callback(typ, message, if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)));
             }
         };
         Impl.deviceSetLoggingCallback(device, Helper.callback, if (Context == void) null else context);
@@ -262,7 +262,7 @@ pub const Device = opaque {
         const Context = @TypeOf(context);
         const Helper = struct {
             pub fn callback(typ: ErrorType, message: [*:0]const u8, userdata: ?*anyopaque) callconv(.C) void {
-                callback(typ, message, if (Context == void) {} else @ptrCast(Context, userdata));
+                callback(typ, message, if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)));
             }
         };
         Impl.deviceSetUncapturedErrorCallback(device, Helper.callback, if (Context == void) null else context);
diff --git a/gpu/src/instance.zig b/gpu/src/instance.zig
index a2e88124..12e4b5a5 100644
--- a/gpu/src/instance.zig
+++ b/gpu/src/instance.zig
@@ -38,7 +38,7 @@ pub const Instance = opaque {
                     status,
                     adapter,
                     message,
-                    if (Context == void) {} else @ptrCast(Context, userdata),
+                    if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)),
                 );
             }
         };
diff --git a/gpu/src/queue.zig b/gpu/src/queue.zig
index fde709dc..2b5005d3 100644
--- a/gpu/src/queue.zig
+++ b/gpu/src/queue.zig
@@ -39,7 +39,7 @@ pub const Queue = opaque {
         const Context = @TypeOf(context);
         const Helper = struct {
             pub fn callback(status: WorkDoneStatus, userdata: ?*anyopaque) callconv(.C) void {
-                callback(status, if (Context == void) {} else @ptrCast(Context, userdata));
+                callback(status, if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)));
             }
         };
         Impl.queueOnSubmittedWorkDone(queue, signal_value, Helper.callback, if (Context == void) null else context);
diff --git a/gpu/src/shader_module.zig b/gpu/src/shader_module.zig
index 98940c4c..e30fb2dc 100644
--- a/gpu/src/shader_module.zig
+++ b/gpu/src/shader_module.zig
@@ -40,7 +40,7 @@ pub const ShaderModule = opaque {
                 callback(
                     status,
                     compilation_info,
-                    if (Context == void) {} else @ptrCast(Context, userdata),
+                    if (Context == void) {} else @ptrCast(Context, @alignCast(@alignOf(Context), userdata)),
                 );
             }
         };