diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index e14253ee8..8d6b53f50 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -937,6 +937,25 @@
       <not-uninit/>
     </arg>
   </function>
+  <!-- wxSizerItem* wxSizer::Add ( wxWindow * window, int proportion = 0, int flag = 0, int border = 0, wxObject * 	userData = NULL) -->
+  <function name="wxSizer::Add,wxBoxSizer::Add,wxGridSizer::Add,wxStaticBoxSizer::Add,wxStdDialogButtonSizer::Add,wxWrapSizer::Add,wxFlexGridSizer::Add,wxGridBagSizer::Add">
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="wxSizerItem*"/>
+    <arg nr="1">
+      <not-null/>
+    </arg>
+    <arg nr="2" default="0">
+      <not-uninit/>
+    </arg>
+    <arg nr="3" default="0">
+      <not-uninit/>
+    </arg>
+    <arg nr="4" default="0">
+      <not-uninit/>
+    </arg>
+    <arg nr="5" default="NULL"/>
+  </function>
   <!-- http://docs.wxwidgets.org/3.1/classwx_box_sizer.html#a58007d1fd88698b9f733ba651977ad55 -->
   <!-- virtual wxSize wxBoxSizer::CalcMin()-->
   <function name="wxBoxSizer::CalcMin">
diff --git a/test/cfg/wxwidgets.cpp b/test/cfg/wxwidgets.cpp
index 9d2e01976..eec87699f 100644
--- a/test/cfg/wxwidgets.cpp
+++ b/test/cfg/wxwidgets.cpp
@@ -21,6 +21,7 @@
 #include <wx/frame.h>
 #include <wx/menu.h>
 #include <wx/stattext.h>
+#include <wx/sizer.h>
 
 void validCode()
 {
@@ -77,7 +78,26 @@ void nullPointer(const wxString &str)
     unsigned long long * ulongLongPtr = NULL;
     // cppcheck-suppress nullPointer
     (void)str.ToULongLong(ulongLongPtr);
+}
 
+void nullPointer_wxSizer_Add(wxSizer &sizer, wxWindow *w)
+{
+	wxWindow * const ptr = 0;
+	// cppcheck-suppress nullPointer
+	sizer.Add(ptr);
+	// No warning shall be issued for
+	sizer.Add(w);
+}
+
+void uninitvar_wxSizer_Add(wxSizer &sizer, wxWindow *w,wxObject* userData )
+{
+	int uninit;
+	// cppcheck-suppress uninitvar
+	sizer.Add(w,uninit);
+	// cppcheck-suppress uninitvar
+	sizer.Add(w,4,uninit);
+	// cppcheck-suppress uninitvar
+	sizer.Add(w,4,2,uninit,userData);
 }
 
 void ignoredReturnValue(const wxString &s)