diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index 290998e3c..8f34e49ad 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -4471,6 +4471,7 @@
       <function name="Length" yields="size"/>
       <function name="Len" yields="size"/>
       <function name="empty" yields="empty"/>
+      <function name="Empty" yields="empty"/>
       <function name="IsEmpty" yields="empty"/>
       <function name="IsNull" yields="empty"/>
       <function name="erase" action="erase"/>
@@ -4482,9 +4483,16 @@
       <function name="Prepend" action="change"/>
       <function name="replace" action="change"/>
       <function name="Replace" action="change"/>
+      <function name="LowerCase" action="change"/>
+      <function name="UpperCase" action="change"/>
+      <function name="MakeCapitalized" action="change"/>
+      <function name="MakeLower" action="change"/>
+      <function name="MakeUpper" action="change"/>
+      <function name="UpperCase" action="change"/>
       <function name="reserve" action="change-internal"/>
       <function name="shrink_to_fit" action="change-internal"/>
       <function name="Shrink" action="change-internal"/>
+      <function name="Strip" action="change-internal"/>
       <function name="Alloc" action="change-internal"/>
       <function name="Strip" action="change"/>
       <function name="Trim" action="change"/>
diff --git a/test/cfg/wxwidgets.cpp b/test/cfg/wxwidgets.cpp
index 754d455bf..a84833183 100644
--- a/test/cfg/wxwidgets.cpp
+++ b/test/cfg/wxwidgets.cpp
@@ -7,6 +7,7 @@
 // No warnings about bad library configuration, unmatched suppressions, etc. exitcode=0
 //
 
+#include <wx/wx.h>
 #include <wx/app.h>
 #include <wx/log.h>
 #include <wx/filefn.h>