diff --git a/lib/nat-analyzer.js b/lib/nat-analyzer.js
index 76ff594..788a36d 100644
--- a/lib/nat-analyzer.js
+++ b/lib/nat-analyzer.js
@@ -104,7 +104,7 @@ class NatAnalyzer {
 NatAnalyzer.UNKNOWN = Symbol.for('NAT_UNKNOWN')
 NatAnalyzer.PORT_CONSISTENT = Symbol.for('NAT_PORT_CONSISTENT')
 NatAnalyzer.PORT_INCREMENTING = Symbol.for('NAT_PORT_INCREMENTING')
-NatAnalyzer.PORT_RANDOMIZED = Symbol.for('NAT_PORT_RANDOM')
+NatAnalyzer.PORT_RANDOMIZED = Symbol.for('NAT_PORT_RANDOMIZED')
 
 module.exports = NatAnalyzer