diff --git a/xhtml2pdf/util.py b/xhtml2pdf/util.py
index <HASH>..<HASH> 100644
--- a/xhtml2pdf/util.py
+++ b/xhtml2pdf/util.py
@@ -301,7 +301,7 @@ def getSize(value, relative=0, base=None, default=0.0):
             return 0.0
         elif relative:
             if value[-3:] == 'rem':  # XXX
-                # 1em = 1 * fontSize
+                # 1rem = 1 * fontSize
                 return float(value[:-3].strip()) * relative
             elif value[-2:] == 'em':  # XXX
                 # 1em = 1 * fontSize
Fix the wrong comment, changing from em to rem