diff --git a/components/brave_wallet/browser/json_rpc_service.cc b/components/brave_wallet/browser/json_rpc_service.cc
index 6cbcdf2f569b..77df7d51d713 100644
--- a/components/brave_wallet/browser/json_rpc_service.cc
+++ b/components/brave_wallet/browser/json_rpc_service.cc
@@ -17,6 +17,7 @@
 #include "base/functional/bind.h"
 #include "base/no_destructor.h"
 #include "base/notreached.h"
+#include "base/strings/strcat.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "brave/components/brave_wallet/browser/blockchain_registry.h"
@@ -315,7 +316,7 @@ bool ValidateNftIdentifiers(
   for (const auto& nft : nft_identifiers) {
     // Create a unique string identifier combining contract, token id, and chain
     std::string unique_id =
-        nft->contract_address + "_" + nft->token_id + "_" + nft->chain_id;
+        base::StrCat({nft->contract_address, nft->token_id, nft->chain_id});
     if (!seen_identifiers.insert(unique_id).second) {
       error_message = l10n_util::GetStringUTF8(IDS_WALLET_INVALID_PARAMETERS);
       return false;