diff --git a/src/effects/nyquist/Nyquist.cpp b/src/effects/nyquist/Nyquist.cpp
index 94d3919a2..85f13eec3 100644
--- a/src/effects/nyquist/Nyquist.cpp
+++ b/src/effects/nyquist/Nyquist.cpp
@@ -2110,7 +2110,7 @@ bool NyquistEffect::ParseProgram(wxInputStream & stream)
       return false;
    }
 
-   wxTextInputStream pgm(stream, wxT(" \t"), wxConvUTF8);
+   wxTextInputStream pgm(stream, wxT(" \t"), wxConvAuto());
 
    mCmd = wxT("");
    mIsSal = false;