diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.js b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.js
index 5243f17..9930bf5 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.js
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list.js
@@ -186,6 +186,7 @@
         labelName = labelName.slice(LABEL_PREFIX_INVALID_PROLOG.length);
       }
       return labelName.split('-').reduce((a, i) => {
+        if (!i) { return a; }
         return a + i[0].toUpperCase();
       }, '');
     },
diff --git a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.html b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.html
index a954d3a..9ce5764 100644
--- a/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.html
+++ b/polygerrit-ui/app/elements/change-list/gr-change-list/gr-change-list_test.html
@@ -130,6 +130,8 @@
           'Invalid-Prolog-Rules-Label-Name--Verified'), 'V');
       assert.equal(element._computeLabelShortcut(
           'Some-Special-Label-7'), 'SSL7');
+      assert.equal(element._computeLabelShortcut('--Too----many----dashes---'),
+          'TMD');
     });
 
     test('colspans', () => {