diff --git a/packages/behavior/type.js b/packages/behavior/type.js
index 8bd52e0..3d8fad0 100644
--- a/packages/behavior/type.js
+++ b/packages/behavior/type.js
@@ -57,9 +57,13 @@ export const invertedDigraph = memoize(() => {
 
 export const candidates = (description, type) => {
   const inverted = invertedDigraph();
+  const typeParts = type.split('|');
+  if (typeParts.length > 1) {
+    return typeParts.reduce((r, typePart) => r.concat(candidates(description, typePart)), []);
+  }
   const types = (inverted[type] || []).concat(type);
   const {children} = description;
-  return 'any' === type
+  const c = 'any' === type
     ? Object.keys(children)
     : Object.entries(children)
       .reduce((r, [key, {type}]) => (
@@ -69,6 +73,7 @@ export const candidates = (description, type) => {
             : []
         )
       ), []);
+  return c;
 };
 
 export function description(type, instance) {