diff --git a/src/effects/nyquist/Nyquist.cpp b/src/effects/nyquist/Nyquist.cpp
index 5db8c1260..e1af03ad8 100644
--- a/src/effects/nyquist/Nyquist.cpp
+++ b/src/effects/nyquist/Nyquist.cpp
@@ -2132,6 +2132,11 @@ bool NyquistEffect::ParseProgram(wxInputStream & stream)
    mTrace = false;
    mDebugButton = true;    // Debug button enabled by default.
    mEnablePreview = true;  // Preview button enabled by default.
+                           
+   // Bug 1934.  
+   // All Nyquist plug-ins should have a ';type' field, but if they don't we default to
+   // being an Effect.
+   mType = EffectTypeProcess;
 
    mFoundType = false;
    while (!stream.Eof() && stream.IsOk())