diff --git a/slider.go b/slider.go
index 4ae1c47..1a138e2 100644
--- a/slider.go
+++ b/slider.go
@@ -1,5 +1,6 @@
 package objects
 
+import "math"
 import "image"
 import "git.tebibyte.media/tomo/tomo"
 import "git.tebibyte.media/tomo/tomo/input"
@@ -33,6 +34,7 @@ func newSlider (orient string, value float64) *Slider {
 		},
 		layout: sliderLayout {
 			vertical: orient == "vertical",
+			value:    math.NaN(),
 		},
 		step: 0.05,
 	}