diff --git a/icon_font_to_png/icon_font.py b/icon_font_to_png/icon_font.py
index d0eadf8..e94ea50 100644
--- a/icon_font_to_png/icon_font.py
+++ b/icon_font_to_png/icon_font.py
@@ -60,6 +60,8 @@ def load_css(self):
                         # Strip quotation marks
                         if re.match("^['\"].*['\"]$", val):
                             val = val[1:-1]
+                        if val[1:] == "":
+                            continue
                         icons[name] = unichr(int(val[1:], 16))
 
         common_prefix = common_prefix or ''