diff --git a/src/browser/events/keyboard_event.zig b/src/browser/events/keyboard_event.zig
index 62deeea7..a2f53686 100644
--- a/src/browser/events/keyboard_event.zig
+++ b/src/browser/events/keyboard_event.zig
@@ -53,8 +53,8 @@ pub const KeyboardEvent = struct {
     pub fn constructor(event_type: []const u8, maybe_options: ?ConstructorOptions) !*parser.KeyboardEvent {
         const options: ConstructorOptions = maybe_options orelse .{};
 
-        var event = try parser.keyboardEventCreate();
-        parser.eventSetInternalType(@ptrCast(&event), .keyboard_event);
+        const event = try parser.keyboardEventCreate();
+        parser.eventSetInternalType(@ptrCast(event), .keyboard_event);
 
         try parser.keyboardEventInit(
             event,
diff --git a/src/browser/events/mouse_event.zig b/src/browser/events/mouse_event.zig
index ea6f1682..e4aa5403 100644
--- a/src/browser/events/mouse_event.zig
+++ b/src/browser/events/mouse_event.zig
@@ -54,8 +54,8 @@ pub const MouseEvent = struct {
     pub fn constructor(event_type: []const u8, opts_: ?MouseEventInit) !*parser.MouseEvent {
         const opts = opts_ orelse MouseEventInit{};
 
-        var mouse_event = try parser.mouseEventCreate();
-        parser.eventSetInternalType(@ptrCast(&mouse_event), .mouse_event);
+        const mouse_event = try parser.mouseEventCreate();
+        parser.eventSetInternalType(@ptrCast(mouse_event), .mouse_event);
 
         try parser.mouseEventInit(mouse_event, event_type, .{
             .x = opts.clientX,