diff --git a/src/util/platform.cpp b/src/util/platform.cpp
index 16adbf89f..dce6f89b7 100644
--- a/src/util/platform.cpp
+++ b/src/util/platform.cpp
@@ -102,7 +102,11 @@ std::string platform::detect_locale() {
     if (programLocaleName && preferredLocaleName) {
         setlocale(LC_ALL, programLocaleName);
 
-        return std::string(preferredLocaleName);
+        if (std::strlen(preferredLocaleName) >= 5) {
+            return std::string(preferredLocaleName, 5);
+        } else {
+            return std::string(preferredLocaleName);
+        }
     }
     return langs::FALLBACK_DEFAULT;
 }