diff --git a/input/drivers/udev_input.c b/input/drivers/udev_input.c
index 36c1463c9e..3cdf013fa4 100644
--- a/input/drivers/udev_input.c
+++ b/input/drivers/udev_input.c
@@ -385,19 +385,29 @@ static int16_t udev_mouse_get_pointer_x(const udev_input_mouse_t *mouse, bool sc
 
    if (mouse->abs) /* mouse coords are absolute */
    {
+      /* mouse coordinates are relative to the screen; convert them
+       * to be relative to the viewport */
+      double scaled_x;
       src_min = mouse->x_min;
       src_width = mouse->x_max - mouse->x_min + 1;
+      scaled_x = vp.full_width * (mouse->x_abs - src_min) / src_width;
+      x = -32767.0 + 65535.0 / vp.width * (scaled_x - vp.x);
    }
    else /* mouse coords are viewport relative */
    {
-      src_min = vp.x;
-      if (screen)
+      if (screen) 
+      {
+         src_min = 0.0;
          src_width = vp.full_width;
-      else
+      }
+      else 
+      {
+         src_min = vp.x;
          src_width = vp.width;
+      }
+      x  = -32767.0 + 65535.0 / src_width * (mouse->x_abs - src_min);
    }
 
-   x  = -32767.0 + 65535.0 / src_width * (mouse->x_abs - src_min);
    x += (x < 0 ? -0.5 : 0.5);
 
    if (x < -0x7fff)
@@ -420,16 +430,26 @@ static int16_t udev_mouse_get_pointer_y(const udev_input_mouse_t *mouse, bool sc
 
    if (mouse->abs) /* mouse coords are absolute */
    {
+      double scaled_y;
+      /* mouse coordinates are relative to the screen; convert them
+       * to be relative to the viewport */
       src_min = mouse->y_min;
       src_height = mouse->y_max - mouse->y_min + 1;
+      scaled_y = vp.full_height * (mouse->y_abs - src_min) / src_height;
+      y = -32767.0 + 65535.0 / vp.height * (scaled_y - vp.y);
    }
    else /* mouse coords are viewport relative */
    {
-      src_min = vp.y;
       if (screen)
+      {
+         src_min = 0.0;
          src_height = vp.full_height;
+      }
       else
+      {
+         src_min = vp.y;
          src_height = vp.height;
+      }
    }
 
    y = -32767.0 + 65535.0 / src_height * (mouse->y_abs - src_min);