diff --git a/lib/type/unit/Unit.js b/lib/type/unit/Unit.js
index c0f9e4c1d..f36d14c02 100644
--- a/lib/type/unit/Unit.js
+++ b/lib/type/unit/Unit.js
@@ -2364,7 +2364,7 @@ function factory (type, config, load, typed) {
     drams: 'dram',
     ounces: 'ounce',
     lb: 'poundmass',
-    lbm: 'poundmass',
+    lbs: 'poundmass',
     poundmasses: 'poundmass',
     hundredweights: 'hundredweight',
     sticks: 'stick',