diff --git a/windows/security/threat-protection/microsoft-defender-application-guard/install-md-app-guard.md b/windows/security/threat-protection/microsoft-defender-application-guard/install-md-app-guard.md
index b4fb01a3c6..222fad81b1 100644
--- a/windows/security/threat-protection/microsoft-defender-application-guard/install-md-app-guard.md
+++ b/windows/security/threat-protection/microsoft-defender-application-guard/install-md-app-guard.md
@@ -81,7 +81,7 @@ Application Guard functionality is turned off by default. However, you can quick
 3. Type the following command:
 
     ```
-    Enable-WindowsOptionalFeature -online -FeatureName Windows-Defender-ApplicationGuard
+    Enable-WindowsOptionalFeature -Online -FeatureName Windows-Defender-ApplicationGuard
     ```
 4. Restart the device.