diff --git a/src/gfx_layout.cpp b/src/gfx_layout.cpp
index a47e3c8ace..6a3d1ee966 100644
--- a/src/gfx_layout.cpp
+++ b/src/gfx_layout.cpp
@@ -569,7 +569,7 @@ static FallbackParagraphLayout *GetParagraphLayout(WChar *buff, WChar *buff_end,
  * @tparam T The type of layouter we want.
  */
 template <typename T>
-static inline void GetLayouter(Layouter::LineCacheItem &line, const char *str, FontState state)
+static inline void GetLayouter(Layouter::LineCacheItem &line, const char *&str, FontState &state)
 {
 	if (line.buffer != NULL) free(line.buffer);