diff --git a/tools/fuzzing/ipc/ProtocolFuzzer.cpp b/tools/fuzzing/ipc/ProtocolFuzzer.cpp
index 88ca7b42f35d..fa6e4167d863 100644
--- a/tools/fuzzing/ipc/ProtocolFuzzer.cpp
+++ b/tools/fuzzing/ipc/ProtocolFuzzer.cpp
@@ -22,7 +22,7 @@ nsTArray<nsCString> LoadIPCMessageBlacklist(const char* aPath) {
 
 mozilla::dom::ContentParent* ProtocolFuzzerHelper::CreateContentParent(
     const nsAString& aRemoteType) {
-  auto* cp = new mozilla::dom::ContentParent(aOpener, aRemoteType);
+  auto* cp = new mozilla::dom::ContentParent(aRemoteType);
   // TODO: this duplicates MessageChannel::Open
   cp->GetIPCChannel()->mWorkerThread = PR_GetCurrentThread();
   cp->GetIPCChannel()->mMonitor = new RefCountedMonitor();