diff --git a/specification.md b/specification.md
index b97c53e..9524fa1 100644
--- a/specification.md
+++ b/specification.md
@@ -452,6 +452,8 @@ enum AgentCapabilities {
     AcceptsOtherConnectionSettings = 0x00000200;
     // The Agent can accept restart requests.
     AcceptsRestartCommand          = 0x00000400;
+    // The Agent will report Health via AgentToServer.health field.
+    ReportsHealth                  = 0x00000800;
 
     // Add new capabilities here, continuing with the least significant unused bit.
 }