diff --git a/desktop/flipper-server-core/src/server/startServer.tsx b/desktop/flipper-server-core/src/server/startServer.tsx
index 012c60033..3ae19cce4 100644
--- a/desktop/flipper-server-core/src/server/startServer.tsx
+++ b/desktop/flipper-server-core/src/server/startServer.tsx
@@ -176,7 +176,7 @@ async function startProxyServer(
     console.warn(
       `Cannot start flipper-server because socket ${socketPath} is in use.`,
     );
-    // TODO: track socket is in use.
+    tracker.track('server-socket-already-in-use', {});
   } else {
     console.info(`Cleaning up stale socket ${socketPath}`);
     await fs.rm(socketPath, {force: true});
diff --git a/desktop/flipper-server-core/src/utils/tracker.tsx b/desktop/flipper-server-core/src/utils/tracker.tsx
index ff672aaa6..00cfed71e 100644
--- a/desktop/flipper-server-core/src/utils/tracker.tsx
+++ b/desktop/flipper-server-core/src/utils/tracker.tsx
@@ -15,6 +15,7 @@ type TrackerEvents = {
     present: boolean;
     error?: string;
   };
+  'server-socket-already-in-use': {};
 };
 
 class ServerCoreTracker {