diff --git a/src/core/metrics.js b/src/core/metrics.js
index e95d6316a..2d8650142 100644
--- a/src/core/metrics.js
+++ b/src/core/metrics.js
@@ -12,14 +12,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* eslint-disable no-var */
 
 import { getLookupTableFactory } from "./core_utils.js";
 
 // The Metrics object contains glyph widths (in glyph space units).
 // As per PDF spec, for most fonts (Type 3 being an exception) a glyph
 // space unit corresponds to 1/1000th of text space unit.
-var getMetrics = getLookupTableFactory(function (t) {
+const getMetrics = getLookupTableFactory(function (t) {
   t.Courier = 600;
   t["Courier-Bold"] = 600;
   t["Courier-BoldOblique"] = 600;