diff --git a/qt/src/EmuCanvasOpenGL.cpp b/qt/src/EmuCanvasOpenGL.cpp
index 71557d9a..250cc33e 100644
--- a/qt/src/EmuCanvasOpenGL.cpp
+++ b/qt/src/EmuCanvasOpenGL.cpp
@@ -212,7 +212,7 @@ void EmuCanvasOpenGL::loadShaders()
     }
     else
     {
-        setlocale(LC_NUMERIC, "C");
+        auto previous_locale = setlocale(LC_NUMERIC, "C");
         shader = std::make_unique<GLSLShader>();
         if (!shader->load_shader(config->shader.c_str()))
         {
@@ -220,7 +220,7 @@ void EmuCanvasOpenGL::loadShaders()
             using_shader = false;
             createStockShaders();
         }
-        setlocale(LC_NUMERIC, "");
+        setlocale(LC_NUMERIC, previous_locale);
     }
 }
 
diff --git a/qt/src/EmuCanvasVulkan.cpp b/qt/src/EmuCanvasVulkan.cpp
index d604ee70..486653d9 100644
--- a/qt/src/EmuCanvasVulkan.cpp
+++ b/qt/src/EmuCanvasVulkan.cpp
@@ -127,14 +127,14 @@ void EmuCanvasVulkan::tryLoadShader()
     if (config->use_shader && !config->shader.empty())
     {
         shader_chain = std::make_unique<Vulkan::ShaderChain>(context.get());
-        setlocale(LC_NUMERIC, "C");
+        auto previous_locale = setlocale(LC_NUMERIC, "C");
         current_shader = config->shader;
         if (!shader_chain->load_shader_preset(config->shader))
         {
             printf("Couldn't load shader preset: %s\n", config->shader.c_str());
             shader_chain.reset();
         }
-        setlocale(LC_NUMERIC, "");
+        setlocale(LC_NUMERIC, previous_locale);
     }
 
     if (!shader_chain)
diff --git a/qt/src/main.cpp b/qt/src/main.cpp
index 7ee6acf6..13ef65e7 100644
--- a/qt/src/main.cpp
+++ b/qt/src/main.cpp
@@ -5,6 +5,7 @@
 
 #include <QStyle>
 #include <QStyleHints>
+#include <clocale>
 #include <qnamespace.h>
 
 #ifndef _WIN32
@@ -16,6 +17,7 @@ int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, const char *lpCmdLine,
 {
     char **argv = nullptr;
     int argc = 0;
+    setlocale(LC_ALL, ".utf8");
 #else
 int main(int argc, char *argv[])
 {