diff --git a/doc/mkdoc b/doc/mkdoc
index b1ed932..998cf1d 100755
--- a/doc/mkdoc
+++ b/doc/mkdoc
@@ -96,14 +96,14 @@ sub main {
 __DATA__
 
 <head><style>
-    body        { background: #fff; margin-left:  40px;   font-size:  0.9em;  font-family: sans-serif; max-width: 800px; }
-    h1          { background: #ffb; margin-left: -30px;   border-top:    5px  solid #ccc; }
-    h2          { background: #ffb; margin-left: -20px;   border-top:    3px  solid #ddd; }
-    h3          { background: #ffb; margin-left: -10px; }
-    h4          { background: #ffb; }
-    code        { font-size:    1.1em;  background:  #ddf; }
-    pre         { margin-left:  2em;    background:  #ddf; }
-    pre code    { font-size:    1.1em;  background:  #ddf; }
+    body        { background: #fff; text-color: #000; margin-left:  40px;   font-size:  0.9em;  font-family: sans-serif; max-width: 800px; }
+    h1          { background: #ffb; text-color: #000; margin-left: -30px;   border-top:    5px  solid #ccc; }
+    h2          { background: #ffb; text-color: #000; margin-left: -20px;   border-top:    3px  solid #ddd; }
+    h3          { background: #ffb; text-color: #000; margin-left: -10px; }
+    h4          { background: #ffb; text-color: #000; }
+    code        { font-size:    1.1em;  background:  #ddf; text-color: #000; }
+    pre         { margin-left:  2em;    background:  #ddf; text-color: #000; }
+    pre code    { font-size:    1.1em;  background:  #ddf; text-color: #000; }
 </style></head>
 
 <p style="text-align:center">
