diff --git a/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac-whatsnew.md b/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac-whatsnew.md
index 1c7bec02ba..7312d11a2d 100644
--- a/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac-whatsnew.md
+++ b/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac-whatsnew.md
@@ -22,7 +22,7 @@ ms.topic: conceptual
 
 ## 100.70.99
 
-- Addressed an issue that impacts ability of some users to upgrade to macOS Catalina when real-time protection is enabled. This sporadic issue was caused by Microsoft Defender ATP locking files within Catalina upgrade package while scanning them for threats, which led to failures in the upgrade sequence.
+- Addressed an issue that impacts the ability of some users to upgrade to macOS Catalina when real-time protection is enabled. This sporadic issue was caused by Microsoft Defender ATP locking files within Catalina upgrade package while scanning them for threats, which led to failures in the upgrade sequence.
 
 ## 100.68.99