diff --git a/internal/ui/input_glfw.go b/internal/ui/input_glfw.go
index f2f7960d6..a90c9f544 100644
--- a/internal/ui/input_glfw.go
+++ b/internal/ui/input_glfw.go
@@ -33,12 +33,18 @@ func CursorPosition() (x, y int) {
 	return current.input.cursorPosition()
 }
 
+var glfwMouseButtonToMouseButton = map[glfw.MouseButton]MouseButton{
+	glfw.MouseButtonLeft:   MouseButtonLeft,
+	glfw.MouseButtonRight:  MouseButtonRight,
+	glfw.MouseButtonMiddle: MouseButtonMiddle,
+}
+
 func (i *input) update(window *glfw.Window, scale int) {
 	for g, e := range glfwKeyCodeToKey {
 		i.keyPressed[e] = window.GetKey(g) == glfw.Press
 	}
-	for b := 0; b < len(i.mouseButtonPressed); b++ {
-		i.mouseButtonPressed[b] = window.GetMouseButton(glfw.MouseButton(b)) == glfw.Press
+	for g, e := range glfwMouseButtonToMouseButton {
+		i.mouseButtonPressed[e] = window.GetMouseButton(g) == glfw.Press
 	}
 	x, y := window.GetCursorPosition()
 	i.cursorX = int(math.Floor(x)) / scale