diff --git a/mithril.js b/mithril.js
index f224d770..5edc18af 100644
--- a/mithril.js
+++ b/mithril.js
@@ -573,6 +573,7 @@ var renderService = function($window) {
 		Object.keys(source).forEach(function(k){target[k] = source[k]})
 	}
 	function render(dom, vnodes) {
+		if (!dom) throw new Error("Ensure the DOM element being passed to m.route/m.mount/m.render is not undefined.")
 		var hooks = []
 		var active = $doc.activeElement
 		// First time rendering into a node clears it out
diff --git a/mithril.min.js b/mithril.min.js
index 1ceb0460..a45a8e48 100644
--- a/mithril.min.js
+++ b/mithril.min.js
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