diff --git a/include/cef.h b/include/cef.h
index 6d2d947f6..a3a24bafe 100644
--- a/include/cef.h
+++ b/include/cef.h
@@ -1142,7 +1142,7 @@ public:
   // modify the object that |client| points to. To change the settings for the
   // new window modify the |settings| structure.
   ///
-  /*--cef()--*/
+  /*--cef(optional_param=url)--*/
   virtual bool OnBeforePopup(CefRefPtr<CefBrowser> parentBrowser,
                              const CefPopupFeatures& popupFeatures,
                              CefWindowInfo& windowInfo,
diff --git a/libcef_dll/cpptoc/life_span_handler_cpptoc.cc b/libcef_dll/cpptoc/life_span_handler_cpptoc.cc
index 4d52e3796..ea2a6a8b0 100644
--- a/libcef_dll/cpptoc/life_span_handler_cpptoc.cc
+++ b/libcef_dll/cpptoc/life_span_handler_cpptoc.cc
@@ -40,10 +40,6 @@ int CEF_CALLBACK life_span_handler_on_before_popup(
   DCHECK(windowInfo);
   if (!windowInfo)
     return 0;
-  // Verify param: url; type: string_byref_const
-  DCHECK(url);
-  if (!url)
-    return 0;
   // Verify param: client; type: refptr_same_byref
   DCHECK(client);
   if (!client)
@@ -52,6 +48,7 @@ int CEF_CALLBACK life_span_handler_on_before_popup(
   DCHECK(settings);
   if (!settings)
     return 0;
+  // Unverified params: url
 
   // Translate param: popupFeatures; type: struct_byref_const
   CefPopupFeatures popupFeaturesObj;
diff --git a/libcef_dll/ctocpp/life_span_handler_ctocpp.cc b/libcef_dll/ctocpp/life_span_handler_ctocpp.cc
index 69045f686..7c2812dec 100644
--- a/libcef_dll/ctocpp/life_span_handler_ctocpp.cc
+++ b/libcef_dll/ctocpp/life_span_handler_ctocpp.cc
@@ -31,10 +31,7 @@ bool CefLifeSpanHandlerCToCpp::OnBeforePopup(
   DCHECK(parentBrowser.get());
   if (!parentBrowser.get())
     return false;
-  // Verify param: url; type: string_byref_const
-  DCHECK(!url.empty());
-  if (url.empty())
-    return false;
+  // Unverified params: url
 
   // Translate param: client; type: refptr_same_byref
   cef_client_t* clientStruct = NULL;