diff --git a/lib/runtime.js b/lib/runtime.js
index bad1904..4fb69c5 100644
--- a/lib/runtime.js
+++ b/lib/runtime.js
@@ -308,7 +308,7 @@ yr.isShort = function( name ) {
     );
 };
 
-var rx_tagName = /[^a-zA-Z]/g;
+var rx_tagName = /[^a-zA-Z0-9]/g;
 yr.tagName = function(name) {
     if (!name) {
         return 'div';
diff --git a/tests/xml.15.yate b/tests/xml.15.yate
new file mode 100644
index 0000000..8f4fcc8
--- /dev/null
+++ b/tests/xml.15.yate
@@ -0,0 +1,15 @@
+/// {
+///     description: 'dynamic tag name with a number',
+///     data: {
+///         name: 'h1',
+///         title: 'Hello'
+///     },
+///     result: '<h1>Hello</h1>'
+/// }
+
+match / {
+    <{ .name }>
+        .title
+    </>
+}
+