diff --git a/include/wx/wfstream.h b/include/wx/wfstream.h
index ae62191d39..a0061f52ae 100644
--- a/include/wx/wfstream.h
+++ b/include/wx/wfstream.h
@@ -116,6 +116,7 @@ class WXDLLIMPEXP_BASE wxFileStream : public wxFileInputStream,
 {
 public:
     wxFileStream(const wxString& fileName);
+    virtual bool IsOk() const;
 
 private:
     DECLARE_NO_COPY_CLASS(wxFileStream)
diff --git a/src/common/wfstream.cpp b/src/common/wfstream.cpp
index 5bc7cf1ce2..1f1600deff 100644
--- a/src/common/wfstream.cpp
+++ b/src/common/wfstream.cpp
@@ -107,9 +107,9 @@ wxFileOffset wxFileInputStream::OnSysTell() const
     return m_file->Tell();
 }
 
-bool wxFileInputStream::IsOk() const 
-{ 
-    return (wxStreamBase::IsOk() && m_file->IsOpened()); 
+bool wxFileInputStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && m_file->IsOpened();
 }
 
 // ----------------------------------------------------------------------------
@@ -183,9 +183,9 @@ wxFileOffset wxFileOutputStream::GetLength() const
     return m_file->Length();
 }
 
-bool wxFileOutputStream::IsOk() const 
-{ 
-    return (wxStreamBase::IsOk() && m_file->IsOpened()); 
+bool wxFileOutputStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && m_file->IsOpened();
 }
 
 // ----------------------------------------------------------------------------
@@ -225,6 +225,11 @@ wxFileStream::wxFileStream(const wxString& fileName)
     wxFileOutputStream::m_file = wxFileInputStream::m_file;
 }
 
+bool wxFileStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && wxFileInputStream::m_file->IsOpened();
+}
+
 #endif //wxUSE_FILE
 
 #if wxUSE_FFILE
@@ -300,9 +305,9 @@ wxFileOffset wxFFileInputStream::OnSysTell() const
     return m_file->Tell();
 }
 
-bool wxFFileInputStream::IsOk() const 
-{ 
-    return (wxStreamBase::IsOk() && m_file->IsOpened()); 
+bool wxFFileInputStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && m_file->IsOpened();
 }
 
 // ----------------------------------------------------------------------------
@@ -386,9 +391,9 @@ wxFileOffset wxFFileOutputStream::GetLength() const
     return m_file->Length();
 }
 
-bool wxFFileOutputStream::IsOk() const 
-{ 
-    return (wxStreamBase::IsOk() && m_file->IsOpened()); 
+bool wxFFileOutputStream::IsOk() const
+{
+    return wxStreamBase::IsOk() && m_file->IsOpened();
 }
 
 // ----------------------------------------------------------------------------