diff --git a/api/ProgressEvent.json b/api/ProgressEvent.json
index 0e98f3ddabc5c9..68c7bc2968c535 100644
--- a/api/ProgressEvent.json
+++ b/api/ProgressEvent.json
@@ -93,6 +93,42 @@
           }
         }
       },
+      "worker_support": {
+        "__compat": {
+          "description": "Available in workers",
+          "support": {
+            "chrome": {
+              "version_added": "47",
+              "partial_implementation": true,
+              "notes": "Available in dedicated workers and shared workers, not available in service workers. See <a href='https://crbug.com/332663431'>bug 332663431</a>."
+            },
+            "chrome_android": "mirror",
+            "edge": "mirror",
+            "firefox": {
+              "version_added": "54"
+            },
+            "firefox_android": "mirror",
+            "ie": {
+              "version_added": false
+            },
+            "oculus": "mirror",
+            "opera": "mirror",
+            "opera_android": "mirror",
+            "safari": {
+              "version_added": "10"
+            },
+            "safari_ios": "mirror",
+            "samsunginternet_android": "mirror",
+            "webview_android": "mirror",
+            "webview_ios": "mirror"
+          },
+          "status": {
+            "experimental": false,
+            "standard_track": true,
+            "deprecated": false
+          }
+        }
+      },
       "lengthComputable": {
         "__compat": {
           "mdn_url": "https://developer.mozilla.org/docs/Web/API/ProgressEvent/lengthComputable",