diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index d0abf0fd2..ed9da2703 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -4179,6 +4179,7 @@
   <define name="wxLANGUAGE_ZULU" value="233"/>
   <define name="wxLANGUAGE_KABYLE" value="234"/>
   <define name="wxLANGUAGE_USER_DEFINED" value="235"/>
+  <define name="wxInvalidOffset" value="-1"/>
   <!--  wxThread and wxProcess priorities -->
   <define name="wxPRIORITY_MIN" value="0"/>
   <define name="wxPRIORITY_DEFAULT" value="50"/>
@@ -6877,4 +6878,10 @@
       <valid>1:</valid>
     </arg>
   </function>
+  <!-- void wxPen::SetCap( wxPenCap cap ) -->
+  <function name="wxPen::SetCap">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <arg nr="1"/>
+  </function>
 </def>