diff --git a/tools/darwin/startup.sh b/tools/darwin/startup.sh
index 86b6e1652f4..d9e45ed74b2 100644
--- a/tools/darwin/startup.sh
+++ b/tools/darwin/startup.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-SUPERTUX_BUNDLE="`echo "$0" | sed -e 's/\/Contents\/MacOS\/SuperTux//'`"
+SUPERTUX_BUNDLE="$(echo "$0" | sed -e 's/\/Contents\/MacOS\/SuperTux//')"
 SUPERTUX_RESOURCES="$SUPERTUX_BUNDLE/Contents/Resources"
 
 export "DYLD_FALLBACK_LIBRARY_PATH=$DYLD_FALLBACK_LIBRARY_PATH:$SUPERTUX_RESOURCES/MacOS"
diff --git a/tools/font-generator.py b/tools/font-generator.py
index d33c02243e2..1d750dd08fa 100755
--- a/tools/font-generator.py
+++ b/tools/font-generator.py
@@ -68,7 +68,7 @@ def draw_glyphs(self, cr, cols, rows):
         cr.select_font_face(self.font_family, cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL)
         cr.set_font_size(self.font_size)
 
-        fascent, fdescent, fheight, fxadvance, fyadvance = cr.font_extents()
+        fascent, fdescent, fheight, fyadvance = cr.font_extents()
 
         print self.glyph_height, fheight
 
@@ -78,7 +78,7 @@ def draw_glyphs(self, cr, cols, rows):
 
                 if idx < len(self.letters):
                     letter = self.letters[idx]
-                    xbearing, ybearing, width, height, xadvance, yadvance = cr.text_extents(letter)
+                    xbearing, ybearing, width, height, yadvance = cr.text_extents(letter)
 
                     #cr.move_to(cx + 0.5 - xbearing - width / 2,
                     #           0.5 - fdescent + fheight / 2)