diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 2d39e18d..a3455583 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -2278,12 +2278,12 @@ tp_init_palmdetect_edge(struct tp_dispatch *tp,
 	if (width < 70.0)
 		return;
 
-	/* palm edges are 5% of the width on each side */
-	mm.x = width * 0.05;
+	/* palm edges are 8% of the width on each side */
+	mm.x = width * 0.08;
 	edges = evdev_device_mm_to_units(device, &mm);
 	tp->palm.left_edge = edges.x;
 
-	mm.x = width * 0.95;
+	mm.x = width * 0.92;
 	edges = evdev_device_mm_to_units(device, &mm);
 	tp->palm.right_edge = edges.x;
 }