diff --git a/app/controllers/copy_controller.js b/app/controllers/copy_controller.js
index f8c858e3..97d6ba07 100644
--- a/app/controllers/copy_controller.js
+++ b/app/controllers/copy_controller.js
@@ -133,9 +133,9 @@ function handleCopyFrom (logger) {
     return function handleCopyFromMiddleware (req, res, next) {
         const sql = req.query.q;
         const { userDbParams, user } = res.locals;
-        const gzip = req.get('content-encoding') === 'gzip';
+        const isGzip = req.get('content-encoding') === 'gzip';
 
-        let metrics = new StreamCopyMetrics(logger, 'copyfrom', sql, user, gzip);
+        let metrics = new StreamCopyMetrics(logger, 'copyfrom', sql, user, isGzip);
 
         streamCopy.from(
             sql, 
@@ -172,7 +172,7 @@ function handleCopyFrom (logger) {
                         }
                     })
                     .on('data', data => {
-                        if (gzip) {
+                        if (isGzip) {
                             metrics.addGzipSize(data.length);
                         } else {
                             metrics.addSize(data.length);
@@ -181,7 +181,7 @@ function handleCopyFrom (logger) {
                     .on('end', () => requestEnded = true);
 
 
-                if (gzip) {
+                if (isGzip) {
                     req
                         .pipe(zlib.createGunzip())
                         .on('data', data => metrics.addSize(data.length))
diff --git a/app/services/stream_copy_metrics.js b/app/services/stream_copy_metrics.js
index 24143a0d..7d6946be 100644
--- a/app/services/stream_copy_metrics.js
+++ b/app/services/stream_copy_metrics.js
@@ -1,12 +1,12 @@
 const { getFormatFromCopyQuery } = require('../utils/query_info');
 
 module.exports = class StreamCopyMetrics {
-    constructor(logger, type, sql, user, gzip = null) {
+    constructor(logger, type, sql, user, isGzip = null) {
         this.logger = logger;
 
         this.type = type;
         this.format = getFormatFromCopyQuery(sql);
-        this.gzip = gzip;
+        this.isGzip = isGzip;
         this.username = user;
         this.size = 0;
         this.gzipSize = 0;
@@ -49,7 +49,7 @@ module.exports = class StreamCopyMetrics {
 
         this._log(
             this.startTime.toISOString(),
-            this.gzip && this.gzipSize ? this.gzipSize : null,
+            this.isGzip && this.gzipSize ? this.gzipSize : null,
             this.error ? this.error.message : null
         );
     }
@@ -60,7 +60,7 @@ module.exports = class StreamCopyMetrics {
             format: this.format,
             size: this.size,
             rows: this.rows,
-            gzip: this.gzip,
+            gzip: this.isGzip,
             username: this.username,
             time: this.time,
             timestamp