diff --git a/include/wx/string.h b/include/wx/string.h
index 9efab68ffb..83ca3c62ee 100644
--- a/include/wx/string.h
+++ b/include/wx/string.h
@@ -200,8 +200,6 @@ public:
     const wchar_t* AsWChar() const;
     operator const wchar_t*() const { return AsWChar(); }
 
-    inline operator bool() const;
-
 #if !wxUSE_UNICODE
     inline
 #endif
@@ -2560,11 +2558,6 @@ inline wxCStrData::~wxCStrData()
         delete m_str;
 }
 
-inline wxCStrData::operator bool() const
-{
-    return !m_str->empty();
-}
-
 // simple cases for AsChar() and AsWChar(), the complicated ones are
 // in string.cpp
 #if wxUSE_UNICODE_WCHAR