diff --git a/include/wx/string.h b/include/wx/string.h
index c3cf3c9b03..7c4bf74d87 100644
--- a/include/wx/string.h
+++ b/include/wx/string.h
@@ -2587,12 +2587,6 @@ private:
 private:
   wxStringImpl m_impl;
 
-#ifdef __VISUALC__
-    // "struct 'ConvertedBuffer<T>' needs to have dll-interface to be used by
-    // clients of class 'wxString'" - this is private, we don't care
-    #pragma warning (disable:4251)
-#endif
-
   // buffers for compatibility conversion from (char*)c_str() and
   // (wchar_t*)c_str():
   // FIXME-UTF8: bechmark various approaches to keeping compatibility buffers
@@ -2621,10 +2615,6 @@ private:
   ConvertedBuffer<wchar_t> m_convertedToWChar;
 #endif
 
-#ifdef __VISUALC__
-    #pragma warning (default:4251)
-#endif
-
 #if wxUSE_UNICODE_UTF8
   // FIXME-UTF8: (try to) move this elsewhere (TLS) or solve differently
   //             assigning to character pointer to by wxString::interator may
diff --git a/include/wx/strvararg.h b/include/wx/strvararg.h
index e60392d2f7..4cbe39b3aa 100644
--- a/include/wx/strvararg.h
+++ b/include/wx/strvararg.h
@@ -124,11 +124,6 @@ class WXDLLIMPEXP_FWD_BASE wxString;
 // accounts for string changes done by wxArgNormalizer<>
 //
 // Note that this class can _only_ be used for function arguments!
-#ifdef __VISUALC__
-    // "struct 'wx[W]CharBuffer<T>' needs to have dll-interface to be used by
-    // clients of class 'wxString'" - this is private, we don't care
-    #pragma warning (disable:4251)
-#endif
 class WXDLLIMPEXP_BASE wxFormatString
 {
 public:
@@ -185,9 +180,6 @@ private:
 private:
     wxCharBuffer  m_char;
     wxWCharBuffer m_wchar;
-#ifdef __VISUALC__
-    #pragma warning (default:4251)
-#endif
 
     // NB: we can use a pointer here, because wxFormatString is only used
     //     as function argument, so it has shorter life than the string