1 files changed, 1 insertions, 0 deletions
diff --git a/using.html b/using.html
index b0f2744..fbcf880 100644
--- a/using.html
+++ b/using.html
@@ -18,6 +18,7 @@
  * Some of the things I use for computing
 -->
 
+<!DOCTYPE html>
 <html>
 	<head>
 		<title>Joe's things I use</title>