diff --git a/inputfiles/patches/webtransport.kdl b/inputfiles/patches/webtransport.kdl
index 246db7097..82ec9e50b 100644
--- a/inputfiles/patches/webtransport.kdl
+++ b/inputfiles/patches/webtransport.kdl
@@ -6,4 +6,8 @@ removals {
     // WebKit has it in a different name datagramsReadableMode.
     member datagramsReadableType
   }
+
+  dictionary WebTransportSendStreamOptions {
+    member waitUntilAvailable // No implementation as of 2025-12.
+  }
 }
diff --git a/inputfiles/removedTypes.jsonc b/inputfiles/removedTypes.jsonc
index a00827f0e..4454b6741 100644
--- a/inputfiles/removedTypes.jsonc
+++ b/inputfiles/removedTypes.jsonc
@@ -423,13 +423,6 @@
                         "xrCompatible": null
                     }
                 }
-            },
-            "WebTransportSendStreamOptions": {
-                "members": {
-                    "member": {
-                        "waitUntilAvailable": null // Blink only as of 2024-09
-                    }
-                }
             }
         }
     },