diff --git a/UI/GameScreen.cpp b/UI/GameScreen.cpp
index 114b6e7a35..89490193df 100644
--- a/UI/GameScreen.cpp
+++ b/UI/GameScreen.cpp
@@ -56,10 +56,11 @@ GameScreen::~GameScreen() {
 	}
 }
 
-std::string int2hexstr(const int a) {
+const char* int2hexstr(const int a) {
 	std::stringstream stream;
 	stream << std::hex << a;
-	return stream.str();
+	auto s = stream.str();
+	return s.c_str();
 }
 
 void GameScreen::update() {
diff --git a/UI/GameScreen.h b/UI/GameScreen.h
index 1018acbf10..43671ec272 100644
--- a/UI/GameScreen.h
+++ b/UI/GameScreen.h
@@ -29,7 +29,7 @@
 // Uses GameInfoCache heavily to implement the functionality.
 // Should possibly merge this with the PauseScreen.
 
-std::string int2hexstr(const int a);
+const char* int2hexstr(const int a);
 
 class GameScreen : public UIDialogScreenWithGameBackground {
 public: