diff --git a/src/material-experimental/mdc-slider/slider.ts b/src/material-experimental/mdc-slider/slider.ts
index 3b86bebc857c..4e2929ec2f2e 100644
--- a/src/material-experimental/mdc-slider/slider.ts
+++ b/src/material-experimental/mdc-slider/slider.ts
@@ -723,6 +723,7 @@ export class MatSlider extends _MatSliderMixinBase
     thumbPosition === Thumb.START
       ? this._startValueIndicatorText = this.displayWith(value)
       : this._endValueIndicatorText = this.displayWith(value);
+    this._cdr.markForCheck();
   }
 
   /** Gets the value indicator text for the given thumb position. */