diff --git a/x-pack/plugins/security_solution/public/hosts/components/hosts_table/translations.ts b/x-pack/plugins/security_solution/public/hosts/components/hosts_table/translations.ts
index ead534b1edc5b..15276355f800c 100644
--- a/x-pack/plugins/security_solution/public/hosts/components/hosts_table/translations.ts
+++ b/x-pack/plugins/security_solution/public/hosts/components/hosts_table/translations.ts
@@ -43,7 +43,7 @@ export const HOST_RISK_TOOLTIP = i18n.translate(
 export const OS_LAST_SEEN_TOOLTIP = i18n.translate(
   'xpack.securitySolution.hostsTable.osLastSeenToolTip',
   {
-    defaultMessage: 'Most recently observed OS',
+    defaultMessage: 'Last observed operating system',
   }
 );