diff --git a/src/font/bold_face.hpp b/src/font/bold_face.hpp
index e9455395b..f68030bef 100644
--- a/src/font/bold_face.hpp
+++ b/src/font/bold_face.hpp
@@ -36,7 +36,7 @@ private:
     // ------------------------------------------------------------------------
     virtual unsigned int getScalingFactorTwo() const OVERRIDE   { return 120; }
     // ------------------------------------------------------------------------
-    virtual bool isBold() const                                { return true; }
+    virtual bool isBold() const OVERRIDE                       { return true; }
     // ------------------------------------------------------------------------
     virtual int shapeOutline(FT_Outline* outline) const OVERRIDE;
 
diff --git a/src/font/font_with_face.hpp b/src/font/font_with_face.hpp
index 0fb4b5f1d..bfc2084cd 100644
--- a/src/font/font_with_face.hpp
+++ b/src/font/font_with_face.hpp
@@ -27,6 +27,7 @@
 #include <cassert>
 #include <map>
 #include <set>
+#include <string>
 
 #include <ft2build.h>
 #include FT_FREETYPE_H