diff --git a/internal/ui/ui_glfw.go b/internal/ui/ui_glfw.go
index c0370cc57..f42bc366b 100644
--- a/internal/ui/ui_glfw.go
+++ b/internal/ui/ui_glfw.go
@@ -121,6 +121,9 @@ const (
 )
 
 func init() {
+	// Lock the main thread.
+	runtime.LockOSThread()
+
 	theUI.userInterfaceImpl = userInterfaceImpl{
 		runnableOnUnfocused:      true,
 		minWindowWidthInDIP:      glfw.DontCare,
@@ -140,9 +143,7 @@ func init() {
 		savedCursorY:             math.NaN(),
 	}
 	theUI.iwindow.ui = &theUI.userInterfaceImpl
-}
 
-func init() {
 	hideConsoleWindowOnWindows()
 
 	if err := initialize(); err != nil {
@@ -869,11 +870,6 @@ func (u *userInterfaceImpl) DeviceScaleFactor() float64 {
 	return f
 }
 
-func init() {
-	// Lock the main thread.
-	runtime.LockOSThread()
-}
-
 // createWindow creates a GLFW window.
 //
 // createWindow must be called from the main thread.
diff --git a/internal/ui/ui_js.go b/internal/ui/ui_js.go
index 2e72dc88d..02a235b53 100644
--- a/internal/ui/ui_js.go
+++ b/internal/ui/ui_js.go
@@ -116,14 +116,6 @@ type userInterfaceImpl struct {
 	dropFileM sync.Mutex
 }
 
-func init() {
-	theUI.userInterfaceImpl = userInterfaceImpl{
-		runnableOnUnfocused: true,
-		savedCursorX:        math.NaN(),
-		savedCursorY:        math.NaN(),
-	}
-}
-
 var (
 	window                = js.Global().Get("window")
 	document              = js.Global().Get("document")
@@ -133,14 +125,9 @@ var (
 )
 
 var (
-	documentHasFocus js.Value
-	documentHidden   js.Value
-)
-
-func init() {
 	documentHasFocus = document.Get("hasFocus").Call("bind", document)
-	documentHidden = js.Global().Get("Object").Call("getOwnPropertyDescriptor", js.Global().Get("Document").Get("prototype"), "hidden").Get("get").Call("bind", document)
-}
+	documentHidden   = js.Global().Get("Object").Call("getOwnPropertyDescriptor", js.Global().Get("Document").Get("prototype"), "hidden").Get("get").Call("bind", document)
+)
 
 func (u *userInterfaceImpl) ScreenSizeInFullscreen() (int, int) {
 	return window.Get("innerWidth").Int(), window.Get("innerHeight").Int()
@@ -485,6 +472,12 @@ func (u *userInterfaceImpl) loop(game Game) <-chan error {
 }
 
 func init() {
+	theUI.userInterfaceImpl = userInterfaceImpl{
+		runnableOnUnfocused: true,
+		savedCursorX:        math.NaN(),
+		savedCursorY:        math.NaN(),
+	}
+
 	// docuemnt is undefined on node.js
 	if !document.Truthy() {
 		return