diff --git a/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h b/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h
index a1dbb49..f77cc77 100644
--- a/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h
+++ b/FlippR-Driver/src/output/items/detail/EightDigitDisplay.h
@@ -36,7 +36,7 @@ public:
     detail::Display::write_score(score, 8);
   }
 
-  void write_content(std::string content) override
+  void write_content(std::string & content) override
   {
     detail::Display::write_content(content, 8);
   }