diff --git a/src/gui/text/qfontengine_ft.cpp b/src/gui/text/qfontengine_ft.cpp
index 492207cd9..45a79bdf6 100644
--- a/src/gui/text/qfontengine_ft.cpp
+++ b/src/gui/text/qfontengine_ft.cpp
@@ -77,7 +77,7 @@ QFreetypeFace::~QFreetypeFace()
     FT_Done_FreeType(library);
 }
 
-void QFreetypeFace::addGlyphToPath(FT_Outline outline, const QFixedPoint &point, QPainterPath *path)
+void QFreetypeFace::addGlyphToPath(const FT_Outline &outline, const QFixedPoint &point, QPainterPath *path)
 {
     static const qreal factor = (1.0 / 64.0);
 
diff --git a/src/gui/text/qfontengine_ft_p.h b/src/gui/text/qfontengine_ft_p.h
index 564ac0523..a71cff552 100644
--- a/src/gui/text/qfontengine_ft_p.h
+++ b/src/gui/text/qfontengine_ft_p.h
@@ -71,7 +71,7 @@ public:
     FT_Face face;
     FT_Library library;
 
-    static void addGlyphToPath(FT_Outline outline, const QFixedPoint &point, QPainterPath *path);
+    static void addGlyphToPath(const FT_Outline &outline, const QFixedPoint &point, QPainterPath *path);
 
 private:
     Q_DISABLE_COPY(QFreetypeFace);