diff --git a/packages/SystemUI/src/com/android/systemui/assist/ui/InvocationLightsView.java b/packages/SystemUI/src/com/android/systemui/assist/ui/InvocationLightsView.java
index bc782a7d62eba..bb3bd781df66d 100644
--- a/packages/SystemUI/src/com/android/systemui/assist/ui/InvocationLightsView.java
+++ b/packages/SystemUI/src/com/android/systemui/assist/ui/InvocationLightsView.java
@@ -100,7 +100,9 @@ public class InvocationLightsView extends View
 
         int cornerRadiusBottom = DisplayUtils.getCornerRadiusBottom(context);
         int cornerRadiusTop = DisplayUtils.getCornerRadiusTop(context);
-        mViewHeight = Math.max(cornerRadiusBottom, cornerRadiusTop);
+        // ensure that height is non-zero even for square corners
+        mViewHeight = Math.max(Math.max(cornerRadiusBottom, cornerRadiusTop),
+            DisplayUtils.convertDpToPx(LIGHT_HEIGHT_DP, context));
 
         final int dualToneDarkTheme = Utils.getThemeAttr(mContext, R.attr.darkIconTheme);
         final int dualToneLightTheme = Utils.getThemeAttr(mContext, R.attr.lightIconTheme);