diff --git a/lint-json.js b/lint-json.js
index 9884ccf..95f2f55 100644
--- a/lint-json.js
+++ b/lint-json.js
@@ -1,5 +1,6 @@
 const osmBoundarySources = require('./osmBoundarySources.json')
 const zoneCfg = require('./timezones.json')
+const expectedZoneOverlaps = require('./expectedZoneOverlaps.json')
 
 let numErrors = 0
 
@@ -37,6 +38,16 @@
   }
 })
 
+// Make sure all expected zone overlaps have a description
+Object.keys(expectedZoneOverlaps).forEach(zoneOverlap => {
+  expectedZoneOverlaps[zoneOverlap].forEach((overlapBounds, idx) => {
+    if (!overlapBounds.description || overlapBounds.description.length < 3) {
+      numErrors++
+      console.error(`Expected overlap #${idx} of zones ${zoneOverlap} missing description`)
+    }
+  })
+})
+
 if (numErrors > 0) {
   console.error(`${numErrors} errors found`)
   process.exit(1)