diff --git a/lib/qualities.js b/lib/qualities.js
index d32e993..eb72f8c 100644
--- a/lib/qualities.js
+++ b/lib/qualities.js
@@ -6,7 +6,8 @@
   groups as objects, which contain qualities that themselves hold definitions.
 */
 
-var undum = require('undum-commonjs');
+var situation = require('./situation.js');
+situation.exportUndum();
 
 var qualities = function (spec) {
   Object.keys(spec).forEach(function(group) {
diff --git a/lib/situation.js b/lib/situation.js
index 4839991..c2e93dd 100644
--- a/lib/situation.js
+++ b/lib/situation.js
@@ -240,5 +240,7 @@ module.exports = function (name, spec) {
 };
 
 module.exports.exportUndum = function () {
-  global.undum = undum;
+  if (!global.undum) {
+    global.undum = undum;
+  }
 };
\ No newline at end of file