diff --git a/protos/launcher_atom.proto b/protos/launcher_atom.proto
index d1bf152..c559988 100644
--- a/protos/launcher_atom.proto
+++ b/protos/launcher_atom.proto
@@ -60,6 +60,7 @@
     PredictedHotseatContainer predicted_hotseat_container = 10;
     TaskSwitcherContainer task_switcher_container = 11;
     TaskBarContainer task_bar_container = 12;
+    WallpapersContainer wallpapers_container = 13;
     ExtendedContainers extended_containers = 20;
   }
 }
@@ -247,6 +248,12 @@
   }
 }
 
+// Represents wallpapers container for quick switching.
+message WallpapersContainer {
+  // Number of wallpapers in the container.
+  optional int32 cardinality = 1;
+}
+
 // Represents state of EditText field before update.
 enum FromState {
   // Default value.