diff --git a/js/xpconnect/src/XPCWrappedJSClass.cpp b/js/xpconnect/src/XPCWrappedJSClass.cpp
index 21e7359a108..b6ea2a434a4 100644
--- a/js/xpconnect/src/XPCWrappedJSClass.cpp
+++ b/js/xpconnect/src/XPCWrappedJSClass.cpp
@@ -136,7 +136,6 @@ nsXPCWrappedJSClass::nsXPCWrappedJSClass(JSContext* cx, REFNSIID aIID,
       mIID(aIID),
       mDescriptors(nullptr)
 {
-    NS_ADDREF(mInfo);
     NS_ADDREF_THIS();
 
     mRuntime->GetWrappedJSClassMap()->Add(this);
@@ -177,7 +176,6 @@ nsXPCWrappedJSClass::~nsXPCWrappedJSClass()
 
     if (mName)
         nsMemory::Free(mName);
-    NS_IF_RELEASE(mInfo);
 }
 
 JSObject*
@@ -1556,7 +1554,7 @@ nsXPCWrappedJSClass::DebugDump(int16_t depth)
         XPC_LOG_ALWAYS(("IID number is %s", iid ? iid : "invalid"));
         if (iid)
             NS_Free(iid);
-        XPC_LOG_ALWAYS(("InterfaceInfo @ %x", mInfo));
+        XPC_LOG_ALWAYS(("InterfaceInfo @ %x", mInfo.get()));
         uint16_t methodCount = 0;
         if (depth) {
             uint16_t i;
diff --git a/js/xpconnect/src/xpcprivate.h b/js/xpconnect/src/xpcprivate.h
index 67844cf57c3..07bdf5440bc 100644
--- a/js/xpconnect/src/xpcprivate.h
+++ b/js/xpconnect/src/xpcprivate.h
@@ -2376,7 +2376,7 @@ private:
 
 private:
     XPCJSRuntime* mRuntime;
-    nsIInterfaceInfo* mInfo;
+    nsCOMPtr<nsIInterfaceInfo> mInfo;
     char* mName;
     nsIID mIID;
     uint32_t* mDescriptors;