diff --git a/lib/internal/cluster/master.js b/lib/internal/cluster/master.js
index 9d6d4df6316956..9e2c7cbecb9963 100644
--- a/lib/internal/cluster/master.js
+++ b/lib/internal/cluster/master.js
@@ -37,16 +37,17 @@ let debugPortOffset = 1;
 let initialized = false;
 
 // XXX(bnoordhuis) Fold cluster.schedulingPolicy into cluster.settings?
-let schedulingPolicy = {
-  'none': SCHED_NONE,
-  'rr': SCHED_RR
-}[process.env.NODE_CLUSTER_SCHED_POLICY];
-
-if (schedulingPolicy === undefined) {
-  // FIXME Round-robin doesn't perform well on Windows right now due to the
-  // way IOCP is wired up.
-  schedulingPolicy = (process.platform === 'win32') ? SCHED_NONE : SCHED_RR;
-}
+let schedulingPolicy = process.env.NODE_CLUSTER_SCHED_POLICY;
+if (schedulingPolicy === 'rr')
+  schedulingPolicy = SCHED_RR;
+else if (schedulingPolicy === 'none')
+  schedulingPolicy = SCHED_NONE;
+else if (process.platform === 'win32') {
+  // Round-robin doesn't perform well on
+  // Windows due to the way IOCP is wired up.
+  schedulingPolicy = SCHED_NONE;
+} else
+  schedulingPolicy = SCHED_RR;
 
 cluster.schedulingPolicy = schedulingPolicy;