diff --git a/lib/extension/otaUpdate.js b/lib/extension/otaUpdate.js
index 82baaa50..8976f4ca 100644
--- a/lib/extension/otaUpdate.js
+++ b/lib/extension/otaUpdate.js
@@ -200,7 +200,7 @@ class OTAUpdate extends Extension {
                     const onProgress = (progress, remaining) => {
                         let msg = `Update of '${resolvedEntity.name}' at ${progress.toFixed(2)}%`;
                         if (remaining) {
-                            msg += `, +- ${Math.round(remaining / 60)} minutes remaining`;
+                            msg += `, ≈ ${Math.round(remaining / 60)} minutes remaining`;
                         }
 
                         logger.info(msg);
diff --git a/test/otaUpdate.test.js b/test/otaUpdate.test.js
index dcda99f2..8e9fc459 100644
--- a/test/otaUpdate.test.js
+++ b/test/otaUpdate.test.js
@@ -51,7 +51,7 @@ describe('OTA update', () => {
         expect(mapped.ota.updateToLatest).toHaveBeenCalledTimes(1);
         expect(mapped.ota.updateToLatest).toHaveBeenCalledWith(device, logger, expect.any(Function));
         expect(logger.info).toHaveBeenCalledWith(`Update of 'bulb' at 0.00%`);
-        expect(logger.info).toHaveBeenCalledWith(`Update of 'bulb' at 10.00%, +- 60 minutes remaining`);
+        expect(logger.info).toHaveBeenCalledWith(`Update of 'bulb' at 10.00%, ≈ 60 minutes remaining`);
         expect(logger.info).toHaveBeenCalledWith(`Finished update of 'bulb', from '{"dateCode":"20190101","softwareBuildID":1}' to '{"dateCode":"20190102","softwareBuildID":2}'`);
         expect(device.save).toHaveBeenCalledTimes(1);
         expect(device.dateCode).toBe('20190102');
@@ -310,7 +310,7 @@ describe('OTA update', () => {
         expect(mapped.ota.updateToLatest).toHaveBeenCalledTimes(1);
         expect(mapped.ota.updateToLatest).toHaveBeenCalledWith(device, logger, expect.any(Function));
         expect(logger.info).toHaveBeenCalledWith(`Update of 'bulb' at 0.00%`);
-        expect(logger.info).toHaveBeenCalledWith(`Update of 'bulb' at 10.00%, +- 60 minutes remaining`);
+        expect(logger.info).toHaveBeenCalledWith(`Update of 'bulb' at 10.00%, ≈ 60 minutes remaining`);
         expect(logger.info).toHaveBeenCalledWith(`Finished update of 'bulb', from '{"dateCode":"20190101","softwareBuildID":1}' to '{"dateCode":"20190102","softwareBuildID":2}'`);
         expect(logger.error).toHaveBeenCalledTimes(0);
         expect(device.save).toHaveBeenCalledTimes(1);