diff --git a/doc/Makefile b/doc/Makefile
index a5816cb..2d1f040 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -13,12 +13,8 @@ clean:
 html/%.html: %.txt
 	mkdir html 2> /dev/null || true
 	( echo '<!doctype html>'; \
-	  echo '<link rel="stylesheet"' \
-	  	'href="http://c9x.me/css/simple.css"' \
-	  	'type="text/css" />'; \
-	  echo '<link rel="stylesheet"' \
-	  	'href="txt.css"' \
-	  	'type="text/css" />'; \
+	  echo '<link rel="stylesheet" href="http://c9x.me/css/simple.css" type="text/css" />'; \
+	  echo '<link rel="stylesheet" href="txt.css" type="text/css" />'; \
 	  sed -ne '2{s,.*,<title>&</title>,;p;q}' $<; \
 	  echo '<div class="container">'; \
 	  sed -ne '2{s,.*,<h2>&</h2>,;p;q}' $<; \
