diff --git a/ivette/src/renderer/ASTview.tsx b/ivette/src/renderer/ASTview.tsx
index 75506913f91ffd69cccd7b1680298b2a38a11444..0787045d89b762e8456e88dc775bb72d67f8cdde 100644
--- a/ivette/src/renderer/ASTview.tsx
+++ b/ivette/src/renderer/ASTview.tsx
@@ -124,7 +124,7 @@ const ASTview = () => {
   }
 
   // Theme Popup
-  const selectTheme = (id?: string) => id && setTheme(id);
+  const selectTheme = (id: string) => setTheme(id);
   const checkTheme =
     (th: { id: string }) => ({ checked: th.id === theme, ...th });
   const themePopup =