diff --git a/pgzero/loaders.py b/pgzero/loaders.py
index d7d2603f..6bb772ef 100644
--- a/pgzero/loaders.py
+++ b/pgzero/loaders.py
@@ -248,6 +248,9 @@ def getfont(
     and so on.
 
     """
+    if fontname is not None and sysfontname is not None:
+        raise ValueError("Can't set both fontname and sysfontname")
+    
     fontname = fontname or ptext.DEFAULT_FONT_NAME
     fontsize = fontsize or ptext.DEFAULT_FONT_SIZE
 
@@ -262,8 +265,9 @@ def getfont(
 
     if key in ptext._font_cache:
         return ptext._font_cache[key]
-
-    if fontname is None:
+    if sysfontname is not None:
+        font = pygame.font.SysFont(sysfontname, fontsize)
+    elif fontname is None:
         font = ptext._font_cache.get(key)
         if font:
             return font
diff --git a/pgzero/ptext.py b/pgzero/ptext.py
index 28607d69..57895f59 100644
--- a/pgzero/ptext.py
+++ b/pgzero/ptext.py
@@ -480,7 +480,7 @@ def drawbox(text, rect, fontname=None, sysfontname=None, lineheight=None, anchor
     y = rect.y + vanchor * rect.height
     fontsize = _fitsize(text, fontname, sysfontname, bold, italic, underline,
                         rect.width, rect.height, lineheight, strip)
-    return draw(text, (x, y), fontname=fontname, fontsize=fontsize, lineheight=lineheight,
+    return draw(text, (x, y), fontname=fontname, sysfontname=sysfontname, fontsize=fontsize, lineheight=lineheight,
                 width=rect.width, strip=strip, anchor=anchor, **kwargs)