diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 57bcc14ff3..3995f9bf2d 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -384,6 +384,13 @@ public class TaskbarActivityContext extends BaseTaskbarContext {
         mLauncherPrefs = LauncherPrefs.get(this);
     }
 
+    /**
+     * Returns whether this is a primary display.
+     */
+    public boolean isPrimaryDisplay() {
+        return mIsPrimaryDisplay;
+    }
+
     /** Updates {@link DeviceProfile} instances for any Taskbar windows. */
     public void updateDeviceProfile(DeviceProfile launcherDp) {
         applyDeviceProfile(launcherDp);
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
index 6ca9385294..58606de9e1 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarControllers.java
@@ -195,8 +195,11 @@ public class TaskbarControllers {
                 voiceInteractionWindowController
         };
 
+        // TODO(b/401061748): get primary status from
+        //  TaskbarDesktopModeController/DesktopVisibilityController.
         if (taskbarDesktopModeController.isInDesktopModeAndNotInOverview(
-                taskbarActivityContext.getDisplayId())) {
+                taskbarActivityContext.getDisplayId())
+                || !taskbarActivityContext.isPrimaryDisplay()) {
             mCornerRoundness.value = taskbarDesktopModeController.getTaskbarCornerRoundness(
                     mSharedState.showCornerRadiusInDesktopMode);
         } else {