diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 925b474d73..872b2d1e0e 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -3870,7 +3870,7 @@ CWallet* CWallet::CreateWalletFromFile(const std::string walletFile)
         // Top up the keypool
         if (!walletInstance->TopUpKeyPool()) {
             InitError(_("Unable to generate initial keys") += "\n");
-            return NULL;
+            return nullptr;
         }
 
         walletInstance->SetBestChain(chainActive.GetLocator());