diff --git a/src/httprpc.cpp b/src/httprpc.cpp
index daac7a0f1a..8ac6925acd 100644
--- a/src/httprpc.cpp
+++ b/src/httprpc.cpp
@@ -112,7 +112,7 @@ static bool multiUserAuthorized(std::string strUserPass)
             std::string strSalt = vFields[1];
             std::string strHash = vFields[2];
 
-            unsigned int KEY_SIZE = 32;
+            static const unsigned int KEY_SIZE = 32;
             unsigned char out[KEY_SIZE];
 
             CHMAC_SHA256(reinterpret_cast<const unsigned char*>(strSalt.c_str()), strSalt.size()).Write(reinterpret_cast<const unsigned char*>(strPass.c_str()), strPass.size()).Finalize(out);
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index 688e8123af..dd75f12076 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -55,8 +55,6 @@ const char* BIP70_MESSAGE_PAYMENTREQUEST = "PaymentRequest";
 const char* BIP71_MIMETYPE_PAYMENT = "application/bitcoin-payment";
 const char* BIP71_MIMETYPE_PAYMENTACK = "application/bitcoin-paymentack";
 const char* BIP71_MIMETYPE_PAYMENTREQUEST = "application/bitcoin-paymentrequest";
-// BIP70 max payment request size in bytes (DoS protection)
-const qint64 BIP70_MAX_PAYMENTREQUEST_SIZE = 50000;
 
 struct X509StoreDeleter {
       void operator()(X509_STORE* b) {
diff --git a/src/qt/paymentserver.h b/src/qt/paymentserver.h
index 9d46280a37..7c6d4507fe 100644
--- a/src/qt/paymentserver.h
+++ b/src/qt/paymentserver.h
@@ -53,7 +53,7 @@ class QUrl;
 QT_END_NAMESPACE
 
 // BIP70 max payment request size in bytes (DoS protection)
-extern const qint64 BIP70_MAX_PAYMENTREQUEST_SIZE;
+static const qint64 BIP70_MAX_PAYMENTREQUEST_SIZE = 50000;
 
 class PaymentServer : public QObject
 {