diff --git a/enterprise/v2/posture/posture.proto b/enterprise/v2/posture/posture.proto
index ed7e8d4..fa4022c 100644
--- a/enterprise/v2/posture/posture.proto
+++ b/enterprise/v2/posture/posture.proto
@@ -52,6 +52,8 @@ message DevicePostureData {
   StringCheck linux_kernel_version = 10;
   // Android and macOS only
   BoolCheck device_integrity = 11;
+  // Android only: Security patch level date string (e.g. "2026-06-05").
+  StringCheck android_security_patch_date = 12;
 }
 
 message DevicePostureCheckRequest {