diff --git a/lib/parallel.js b/lib/parallel.js
index ffa91f5..522d105 100644
--- a/lib/parallel.js
+++ b/lib/parallel.js
@@ -13,11 +13,14 @@ function parallel() {
   var args = normalizeArgs(this._registry, arguments);
   var extensions = createExtensions(this);
   var fn = create(args, extensions);
+
+  fn.displayName = '<parallel>';
+
   metadata.set(fn, {
-    name: 'parallel',
+    name: fn.displayName,
     branch: true,
     tree: {
-      label: '<parallel>',
+      label: fn.displayName,
       type: 'function',
       nodes: buildTree(args),
     },
diff --git a/lib/series.js b/lib/series.js
index 7941101..ba94dba 100644
--- a/lib/series.js
+++ b/lib/series.js
@@ -13,11 +13,14 @@ function series() {
   var args = normalizeArgs(this._registry, arguments);
   var extensions = createExtensions(this);
   var fn = create(args, extensions);
+
+  fn.displayName = '<series>';
+
   metadata.set(fn, {
-    name: 'series',
+    name: fn.displayName,
     branch: true,
     tree: {
-      label: '<series>',
+      label: fn.displayName,
       type: 'function',
       nodes: buildTree(args),
     },