diff --git a/src/common/txtstrm.cpp b/src/common/txtstrm.cpp
index 404f31f594..6f85a1d6cb 100644
--- a/src/common/txtstrm.cpp
+++ b/src/common/txtstrm.cpp
@@ -430,6 +430,8 @@ wxTextOutputStream& wxTextOutputStream::operator<<(char c)
 wxTextOutputStream& wxTextOutputStream::operator<<(wchar_t wc)
 {
     WriteString( wxString(&wc, m_conv, 1) );
+
+    return *this;
 }
 
 #endif // wxUSE_WCHAR_T