diff --git a/src/framework/core/resourcemanager.cpp b/src/framework/core/resourcemanager.cpp
index c14ef3c1..87ccc069 100644
--- a/src/framework/core/resourcemanager.cpp
+++ b/src/framework/core/resourcemanager.cpp
@@ -55,7 +55,7 @@ bool ResourceManager::discoverWorkDir(const std::string& existentFile)
             continue;
 
         if(PHYSFS_exists(existentFile.c_str())) {
-            g_logger.debug(stdext::format("Found work dir at '%s'", dir.c_str()));
+            g_logger.debug(stdext::format("Found work dir at '%s'", dir));
             m_workDir = dir;
             found = true;
             break;
diff --git a/src/framework/platform/unixcrashhandler.cpp b/src/framework/platform/unixcrashhandler.cpp
index ee78d9c0..aeae5f72 100644
--- a/src/framework/platform/unixcrashhandler.cpp
+++ b/src/framework/platform/unixcrashhandler.cpp
@@ -111,7 +111,7 @@ void crashHandler(int signum, siginfo_t* info, void* secret)
         fout << ss.str();
         fout << "\n";
         fout.close();
-        g_logger.info(stdext::format("Crash report saved to file %s", fileName.c_str()));
+        g_logger.info(stdext::format("Crash report saved to file %s", fileName));
     } else
         g_logger.error("Failed to save crash report!");
 
diff --git a/src/framework/platform/win32crashhandler.cpp b/src/framework/platform/win32crashhandler.cpp
index a7423b3b..59544a21 100644
--- a/src/framework/platform/win32crashhandler.cpp
+++ b/src/framework/platform/win32crashhandler.cpp
@@ -111,13 +111,13 @@ LONG CALLBACK ExceptionHandler(LPEXCEPTION_POINTERS e)
     SymInitialize(GetCurrentProcess(), 0, TRUE);
     std::stringstream ss;
     ss << "== application crashed\n";
-    ss << stdext::format("app name: %s\n", g_app.getName().c_str());
-    ss << stdext::format("app version: %s\n", g_app.getVersion().c_str());
+    ss << stdext::format("app name: %s\n", g_app.getName());
+    ss << stdext::format("app version: %s\n", g_app.getVersion());
     ss << stdext::format("build compiler: %s\n", BUILD_COMPILER);
     ss << stdext::format("build date: %s\n", __DATE__);
     ss << stdext::format("build type: %s\n", BUILD_TYPE);
     ss << stdext::format("build revision: %s (%s)\n", BUILD_REVISION, BUILD_COMMIT);
-    ss << stdext::format("crash date: %s\n", stdext::date_time_string().c_str());
+    ss << stdext::format("crash date: %s\n", stdext::date_time_string());
     ss << stdext::format("exception: %s (0x%08lx)\n", getExceptionName(e->ExceptionRecord->ExceptionCode), e->ExceptionRecord->ExceptionCode);
     ss << stdext::format("exception address: 0x%08lx\n", (long unsigned int)e->ExceptionRecord->ExceptionAddress);
     ss << stdext::format("  backtrace:\n");
diff --git a/src/framework/platform/win32window.cpp b/src/framework/platform/win32window.cpp
index 6e3de22e..68a81ec4 100644
--- a/src/framework/platform/win32window.cpp
+++ b/src/framework/platform/win32window.cpp
@@ -236,7 +236,7 @@ void WIN32Window::terminate()
     }
 
     if(m_instance) {
-        if(!UnregisterClassA(g_app.getCompactName().c_str(), m_instance))
+        if(!UnregisterClassA(g_app.getCompactName(), m_instance))
             g_logger.error("UnregisterClassA failed");
         m_instance = NULL;
     }
@@ -262,7 +262,7 @@ void WIN32Window::internalCreateWindow()
     wc.hCursor          = m_defaultCursor;
     wc.hbrBackground    = (HBRUSH)GetStockObject(WHITE_BRUSH);
     wc.lpszMenuName     = NULL;
-    wc.lpszClassName    = g_app.getCompactName().c_str();
+    wc.lpszClassName    = g_app.getCompactName();
 
     if(!RegisterClassA(&wc))
         g_logger.fatal("Failed to register the window class.");
diff --git a/src/framework/stdext/format.h b/src/framework/stdext/format.h
index abc077cb..3002a46e 100644
--- a/src/framework/stdext/format.h
+++ b/src/framework/stdext/format.h
@@ -48,6 +48,7 @@ typename std::enable_if<std::is_integral<T>::value ||
                         std::is_pointer<T>::value ||
                         std::is_floating_point<T>::value ||
                         std::is_enum<T>::value, T>::type sprintf_cast(const T& t) { return t; }
+inline const char *sprintf_cast(const char *s) { return s; }
 inline const char *sprintf_cast(const std::string& s) { return s.c_str(); }
 
 template<int N> struct expand_snprintf {
diff --git a/src/framework/ui/uiwidget.cpp b/src/framework/ui/uiwidget.cpp
index b4af4121..31e97e3f 100644
--- a/src/framework/ui/uiwidget.cpp
+++ b/src/framework/ui/uiwidget.cpp
@@ -536,7 +536,7 @@ void UIWidget::applyStyle(const OTMLNodePtr& styleNode)
         for(const OTMLNodePtr& node : styleNode->children()) {
             if(node->tag()[0] == '!') {
                 std::string tag = node->tag().substr(1);
-                std::string code = stdext::format("tostring(%s)", node->value().c_str());
+                std::string code = stdext::format("tostring(%s)", node->value());
                 std::string origin = "@" + node->source() + ": [" + node->tag() + "]";
                 g_lua.evaluateExpression(code, origin);
                 std::string value = g_lua.popString();