diff --git a/chromium_src/chrome/browser/favicon/favicon_utils.cc b/chromium_src/chrome/browser/favicon/favicon_utils.cc
index 4032b1cbf707..7873d0e051bd 100644
--- a/chromium_src/chrome/browser/favicon/favicon_utils.cc
+++ b/chromium_src/chrome/browser/favicon/favicon_utils.cc
@@ -21,7 +21,8 @@ bool ShouldThemifyFaviconForEntry(content::NavigationEntry* entry) {
   // Don't theme for certain brave favicons which are full color
   if (virtual_url.SchemeIs(content::kChromeUIScheme) &&
       (virtual_url.host_piece() == kRewardsPageHost ||
-       virtual_url.host_piece() == kWalletPageHost)) {
+       virtual_url.host_piece() == kWalletPageHost ||
+       virtual_url.host_piece() == kAIChatUIHost)) {
     return false;
   }
   return ShouldThemifyFaviconForEntry_ChromiumImpl(entry);