diff --git a/render/tests/test-trust.js b/render/tests/test-trust.js
index 6e7d7130..d0f4b2ca 100644
--- a/render/tests/test-trust.js
+++ b/render/tests/test-trust.js
@@ -16,4 +16,16 @@ o.spec("trust", function() {
 		o(vnode.tag).equals("<")
 		o(vnode.children).equals("abc")
 	})
+	o("casts null to empty string", function() {
+		var vnode = trust(null)
+
+		o(vnode.tag).equals("<")
+		o(vnode.children).equals("")
+	})
+	o("casts undefined to empty string", function() {
+		var vnode = trust(undefined)
+
+		o(vnode.tag).equals("<")
+		o(vnode.children).equals("")
+	})
 })
diff --git a/render/trust.js b/render/trust.js
index b1215451..5995e287 100644
--- a/render/trust.js
+++ b/render/trust.js
@@ -3,5 +3,6 @@
 var Vnode = require("../render/vnode")
 
 module.exports = function(html) {
+	if (html == null) html = ""
 	return Vnode("<", undefined, undefined, html, undefined, undefined)
 }