diff --git a/src/panels/profile/ha-pick-theme-row.ts b/src/panels/profile/ha-pick-theme-row.ts
index b0147b6842..59d9774712 100644
--- a/src/panels/profile/ha-pick-theme-row.ts
+++ b/src/panels/profile/ha-pick-theme-row.ts
@@ -173,6 +173,9 @@ export class HaPickThemeRow extends LitElement {
   }
 
   private _supportsModeSelection(themeName: string): boolean {
+    if (!(themeName in this.hass.themes.themes)) {
+      return false; // User's theme no longer exists
+    }
     return "modes" in this.hass.themes.themes[themeName];
   }