diff --git a/app/src/main/kotlin/io/homeassistant/companion/android/util/compose/Theme.kt b/app/src/main/kotlin/io/homeassistant/companion/android/util/compose/Theme.kt
index acccc740eab..26d389284a7 100644
--- a/app/src/main/kotlin/io/homeassistant/companion/android/util/compose/Theme.kt
+++ b/app/src/main/kotlin/io/homeassistant/companion/android/util/compose/Theme.kt
@@ -50,6 +50,13 @@ private val haDarkColors = darkColors(
  * A Compose [MaterialTheme] version of the app's XML theme. This achieves the same goal as the
  * (now deprecated) [com.google.accompanist.themeadapter.material.MdcTheme].
  */
+@Deprecated(
+    "Uses Material Design 2. Use HATheme (Material Design 3) instead. Kept until remaining call sites are migrated.",
+    replaceWith = ReplaceWith(
+        "HATheme { content() }",
+        "io.homeassistant.companion.android.common.compose.theme.HATheme",
+    ),
+)
 @Composable
 fun HomeAssistantAppTheme(content: @Composable () -> Unit) {
     MaterialTheme(