diff --git a/windows/security/threat-protection/windows-defender-atp/exposed-apis-windows-defender-advanced-threat-protection-new.md b/windows/security/threat-protection/windows-defender-atp/exposed-apis-windows-defender-advanced-threat-protection-new.md
index 3541fd8546..34f09684f4 100644
--- a/windows/security/threat-protection/windows-defender-atp/exposed-apis-windows-defender-advanced-threat-protection-new.md
+++ b/windows/security/threat-protection/windows-defender-atp/exposed-apis-windows-defender-advanced-threat-protection-new.md
@@ -13,7 +13,7 @@ ms.localizationpriority: medium
 ms.date: 30/07/2018
 ---
 
-# Use Windows Defender ATP APIs 
+# Use Windows Defender ATP APIsx 
 
 **Applies to:**