diff --git a/examples/keyboard/Keyboard.cpp b/examples/keyboard/Keyboard.cpp
index ae6fa641d..a1155e607 100644
--- a/examples/keyboard/Keyboard.cpp
+++ b/examples/keyboard/Keyboard.cpp
@@ -734,7 +734,7 @@ sf::String textEventDescription(const sf::Event::TextEntered& textEntered)
     text += "\nU+";
 
     std::ostringstream oss;
-    oss << std::hex << std::setw(4) << std::setfill('0') << textEntered.unicode;
+    oss << std::hex << std::setw(4) << std::setfill('0') << std::uint32_t{textEntered.unicode};
     text += oss.str();
 
     return text;
diff --git a/test/System/String.test.cpp b/test/System/String.test.cpp
index e505b79dd..996f03b7d 100644
--- a/test/System/String.test.cpp
+++ b/test/System/String.test.cpp
@@ -29,7 +29,7 @@ auto select(const std::basic_string<T>& string16, const std::basic_string<T>& st
 auto toHex(const char32_t character)
 {
     std::ostringstream stream;
-    stream << "[\\x" << std::uppercase << std::hex << character << ']';
+    stream << "[\\x" << std::uppercase << std::hex << std::uint32_t{character} << ']';
     return stream.str();
 }
 } // namespace