diff --git a/content/browser/webui/web_ui_data_source_impl.cc b/content/browser/webui/web_ui_data_source_impl.cc
index 42955f79fe8f60b4b7554167e85b1b369610cec7..fea89197c7f76657ecb0cec9bbc56a6c0cbda025 100644
--- a/content/browser/webui/web_ui_data_source_impl.cc
+++ b/content/browser/webui/web_ui_data_source_impl.cc
@@ -315,7 +315,7 @@ bool WebUIDataSourceImpl::IsWebUIDataSourceImpl() const {
 void WebUIDataSourceImpl::OverrideContentSecurityPolicy(
     network::mojom::CSPDirectiveName directive,
     const std::string& value) {
-  csp_overrides_.insert_or_assign(directive, value);
+  csp_overrides_.insert_or_assign(directive, GetBraveTrustedTypesValue(directive, value));
 }
 
 void WebUIDataSourceImpl::OverrideCrossOriginOpenerPolicy(