--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -12483,17 +12483,17 @@
   "SANDBOX_FAILED_LAUNCH": {
     "record_in_processes": ["main"],
     "alert_emails": ["bowen@mozilla.com"],
     "expires_in_version": "60",
     "kind": "enumerated",
     "n_values": 50,
     "bug_numbers": [1368600],
     "cpp_guard": "XP_WIN",
-    "description": "Error code when a Windows sandboxed process fails to launch."
+    "description": "Error code when a Windows sandboxed process fails to launch. See https://dxr.mozilla.org/mozilla-central/search?q=ResultCode++path%3Asandbox_types.h&redirect=true for definitions of the error codes."
   },
   "SYNC_WORKER_OPERATION": {
     "record_in_processes": ["main", "content"],
     "alert_emails": ["amarchesini@mozilla.com", "khuey@mozilla.com" ],
     "bug_numbers": [1267904],
     "expires_in_version": "never",
     "kind": "exponential",
     "high": 5000,