diff --git a/src/qt/qt_platform.cpp b/src/qt/qt_platform.cpp
index 807b64a52..a53634f45 100644
--- a/src/qt/qt_platform.cpp
+++ b/src/qt/qt_platform.cpp
@@ -374,28 +374,31 @@ void set_language(uint32_t id) {
     lang_id = id;
 }
 
-QMap<uint32_t, QPair<QString, QString>> ProgSettings::lcid_langcode =
+extern "C++"
 {
-    {0x0405, {"cs-CZ", "Czech (Czech Republic)"} },
-    {0x0407, {"de-DE", "German (Germany)"} },
-    {0x0408, {"en-US", "English (United States)"} },
-    {0x0809, {"en-GB", "English (United Kingdom)"} },
-    {0x0C0A, {"es-ES", "Spanish (Spain)"} },
-    {0x040B, {"fi-FI", "Finnish (Finland)"} },
-    {0x040C, {"fr-FR", "French (France)"} },
-    {0x041A, {"hr-HR", "Croatian (Croatia)"} },
-    {0x040E, {"hu-HU", "Hungarian (Hungary)"} },
-    {0x0410, {"it-IT", "Italian (Italy)"} },
-    {0x0411, {"ja-JP", "Japanese (Japan)"} },
-    {0x0412, {"ko-KR", "Korean (Korea)"} },
-    {0x0416, {"pt-BR", "Portuguese (Brazil)"} },
-    {0x0816, {"pt-PT", "Portuguese (Portugal)"} },
-    {0x0419, {"ru-RU", "Russian (Russia)"} },
-    {0x0424, {"sl-SI", "Slovenian (Slovenia)"} },
-    {0x041F, {"tr-TR", "Turkish (Turkey)"} },
-    {0x0804, {"zh-CN", "Chinese (China)"} },
-    {0xFFFF, {"system", "(System Default)"} },
-};
+    QMap<uint32_t, QPair<QString, QString>> ProgSettings::lcid_langcode =
+    {
+        {0x0405, {"cs-CZ", "Czech (Czech Republic)"} },
+        {0x0407, {"de-DE", "German (Germany)"} },
+        {0x0408, {"en-US", "English (United States)"} },
+        {0x0809, {"en-GB", "English (United Kingdom)"} },
+        {0x0C0A, {"es-ES", "Spanish (Spain)"} },
+        {0x040B, {"fi-FI", "Finnish (Finland)"} },
+        {0x040C, {"fr-FR", "French (France)"} },
+        {0x041A, {"hr-HR", "Croatian (Croatia)"} },
+        {0x040E, {"hu-HU", "Hungarian (Hungary)"} },
+        {0x0410, {"it-IT", "Italian (Italy)"} },
+        {0x0411, {"ja-JP", "Japanese (Japan)"} },
+        {0x0412, {"ko-KR", "Korean (Korea)"} },
+        {0x0416, {"pt-BR", "Portuguese (Brazil)"} },
+        {0x0816, {"pt-PT", "Portuguese (Portugal)"} },
+        {0x0419, {"ru-RU", "Russian (Russia)"} },
+        {0x0424, {"sl-SI", "Slovenian (Slovenia)"} },
+        {0x041F, {"tr-TR", "Turkish (Turkey)"} },
+        {0x0804, {"zh-CN", "Chinese (China)"} },
+        {0xFFFF, {"system", "(System Default)"} },
+    };
+}
 
 /* Sets up the program language before initialization. */
 uint32_t plat_language_code(char* langcode) {