diff --git a/client/protocols/protocols_defs.h b/client/protocols/protocols_defs.h
index c158822d1..9e121f568 100644
--- a/client/protocols/protocols_defs.h
+++ b/client/protocols/protocols_defs.h
@@ -58,6 +58,11 @@ constexpr char additional_server_config[] = "additional_server_config";
 
 // proto config keys
 constexpr char last_config[] = "last_config";
+
+constexpr char is_third_party_config[] = "is_third_party_config";
+
+constexpr char openvpn[] = "openvpn";
+
 }
 
 namespace protocols {
diff --git a/client/settings.cpp b/client/settings.cpp
index ccef9e403..8202eb277 100644
--- a/client/settings.cpp
+++ b/client/settings.cpp
@@ -317,5 +317,5 @@ bool Settings::isThirdPartyConfig(int serverIndex) const
 {
     if (serverIndex < 0) return false;
     const QJsonObject &s = server(serverIndex);
-    return s.value("isThirdPartyConfig").toBool();
+    return s.value(config_key::is_third_party_config).toBool();
 }
diff --git a/client/ui/pages_logic/StartPageLogic.cpp b/client/ui/pages_logic/StartPageLogic.cpp
index 6a6333e96..897caaaf9 100644
--- a/client/ui/pages_logic/StartPageLogic.cpp
+++ b/client/ui/pages_logic/StartPageLogic.cpp
@@ -249,7 +249,7 @@ bool StartPageLogic::importConnectionFromOpenVpnConfig(const QString &config)
 
     QJsonObject containers;
     containers.insert(config_key::container, QJsonValue("amnezia-openvpn"));
-    containers.insert("openvpn", QJsonValue(lastConfig));
+    containers.insert(config_key::openvpn, QJsonValue(lastConfig));
 
     QJsonArray arr;
     arr.push_back(containers);
@@ -275,7 +275,7 @@ bool StartPageLogic::importConnectionFromOpenVpnConfig(const QString &config)
         o[config_key::hostName] = hostNameMatch.captured(0).split(" ").at(1);
     }
 
-    o["isThirdPartyConfig"] = true;
+    o[config_key::is_third_party_config] = true;
 
     return importConnection(o);
 }