diff --git a/src/js/tabs/cli.js b/src/js/tabs/cli.js
index 2a724953..608f12e9 100644
--- a/src/js/tabs/cli.js
+++ b/src/js/tabs/cli.js
@@ -254,13 +254,13 @@ TABS.cli.read = function (readInfo) {
 
         switch (data[i]) {
             case lineFeedCode:
-                if (GUI.operating_system != "MacOS") {
+                if (GUI.operating_system === "Windows") {
                     writeLineToOutput(this.cliBuffer);
                     this.cliBuffer = "";
                 }
                 break;
             case carriageReturnCode:
-                if (GUI.operating_system == "MacOS") {
+                if (GUI.operating_system !== "Windows") {
                     writeLineToOutput(this.cliBuffer);
                     this.cliBuffer = "";
                 }
diff --git a/test/tabs/cli.js b/test/tabs/cli.js
index a0944187..a16ea092 100644
--- a/test/tabs/cli.js
+++ b/test/tabs/cli.js
@@ -43,7 +43,7 @@ describe('TABS.cli', () => {
 
             // Ambigous auto-complete from firmware is preceded with an \r carriage return
             // which only renders a line break on Mac
-            const expectedValue = GUI.operating_system === "MacOS" ?
+            const expectedValue = GUI.operating_system !== "Windows" ?
                 'se<br>serialpassthrough\tservo<br>' :
                 'seserialpassthrough\tservo<br>';
             expect(cliOutput.html()).to.equal(expectedValue);