diff --git a/src/Main/Application.cpp b/src/Main/Application.cpp
index c72e2cc6..27b8f55a 100644
--- a/src/Main/Application.cpp
+++ b/src/Main/Application.cpp
@@ -89,7 +89,7 @@ namespace VeraCrypt
 
 	FilePath Application::GetConfigFilePath (const wxString &configFileName, bool createConfigDir)
 	{
-		static wxScopedPtr<const wxString> configDirC;
+		static std::unique_ptr<const wxString> configDirC;
 		static bool configDirExists = false;
 
 		if (!configDirExists)
diff --git a/src/Main/Forms/VolumeCreationWizard.cpp b/src/Main/Forms/VolumeCreationWizard.cpp
index 2653ff66..0eae11d6 100644
--- a/src/Main/Forms/VolumeCreationWizard.cpp
+++ b/src/Main/Forms/VolumeCreationWizard.cpp
@@ -975,7 +975,7 @@ namespace VeraCrypt
 						if (OuterVolume && VolumeSize > TC_MAX_FAT_SECTOR_COUNT * SectorSize)
 						{
 							uint64 limit = TC_MAX_FAT_SECTOR_COUNT * SectorSize / BYTES_PER_TB;
-							wstring err = StringFormatter (LangString["LINUX_ERROR_SIZE_HIDDEN_VOL"], limit, limit * 1024);
+							wstring err = static_cast<wstring>(StringFormatter (LangString["LINUX_ERROR_SIZE_HIDDEN_VOL"], limit, limit * 1024));
 
 							if (SectorSize < 4096)
 							{
diff --git a/src/Main/Resources.cpp b/src/Main/Resources.cpp
index d8bab977..18a58181 100644
--- a/src/Main/Resources.cpp
+++ b/src/Main/Resources.cpp
@@ -71,12 +71,12 @@ namespace VeraCrypt
 
 		UserPreferences Preferences;
 		Preferences.Load();
-		wstring preferredLang = Preferences.Language;
+		string preferredLang = string(Preferences.Language.begin(), Preferences.Language.end());
 #ifdef DEBUG
 		std::cout << "Config language: " << preferredLang << std::endl;
 #endif
 
-		if (preferredLang == L"system") {
+		if (preferredLang == "system") {
 			if (const char *env_p = getenv("LANG")) {
 				string lang(env_p);
 #ifdef DEBUG
diff --git a/src/Main/StringFormatter.h b/src/Main/StringFormatter.h
index 33a47a35..97c39ae2 100644
--- a/src/Main/StringFormatter.h
+++ b/src/Main/StringFormatter.h
@@ -52,7 +52,7 @@ namespace VeraCrypt
 		StringFormatter (const wxString &format, StringFormatterArg arg0 = StringFormatterArg(), StringFormatterArg arg1 = StringFormatterArg(), StringFormatterArg arg2 = StringFormatterArg(), StringFormatterArg arg3 = StringFormatterArg(), StringFormatterArg arg4 = StringFormatterArg(), StringFormatterArg arg5 = StringFormatterArg(), StringFormatterArg arg6 = StringFormatterArg(), StringFormatterArg arg7 = StringFormatterArg(), StringFormatterArg arg8 = StringFormatterArg(), StringFormatterArg arg9 = StringFormatterArg());
 		virtual ~StringFormatter ();
 
-		operator wstring () const { return wstring (FormattedString); }
+		explicit operator wstring () const { return wstring (FormattedString); }
 		operator wxString () const { return FormattedString; }
 		operator StringFormatterArg () const { return FormattedString; }
 
diff --git a/src/Main/UserInterface.cpp b/src/Main/UserInterface.cpp
index 3ec2e8dc..09b1fcdd 100644
--- a/src/Main/UserInterface.cpp
+++ b/src/Main/UserInterface.cpp
@@ -390,7 +390,7 @@ namespace VeraCrypt
 			errOutput += StringConverter::ToWide (execEx->GetErrorOutput());
 
 			if (errOutput.empty())
-				return errOutput + StringFormatter (LangString["LINUX_COMMAND_GET_ERROR"], execEx->GetCommand(), execEx->GetExitCode());
+				return errOutput + static_cast<wstring>(StringFormatter (LangString["LINUX_COMMAND_GET_ERROR"], execEx->GetCommand(), execEx->GetExitCode()));
 
 			return wxString (errOutput).Trim (true);
 		}
@@ -1516,7 +1516,7 @@ namespace VeraCrypt
 		EncryptionTest::TestAll();
 
 		// StringFormatter
-		if (StringFormatter (L"{9} {8} {7} {6} {5} {4} {3} {2} {1} {0} {{0}}", "1", L"2", '3', L'4', 5, 6, 7, 8, 9, 10) != L"10 9 8 7 6 5 4 3 2 1 {0}")
+		if (static_cast<wstring>(StringFormatter (L"{9} {8} {7} {6} {5} {4} {3} {2} {1} {0} {{0}}", "1", L"2", '3', L'4', 5, 6, 7, 8, 9, 10)) != L"10 9 8 7 6 5 4 3 2 1 {0}")
 			throw TestFailed (SRC_POS);
 		try
 		{