Index: trunk/ppSim/src/ppSimInsertStars.c
===================================================================
--- trunk/ppSim/src/ppSimInsertStars.c	(revision 36375)
+++ trunk/ppSim/src/ppSimInsertStars.c	(revision 36862)
@@ -116,5 +116,5 @@
 	// (inserting flux with a variable radius introduces a flux-dependent bias)
 	if (radius < 0) {
-	  radius = model->modelRadius (model->params, nSigmaLim * roughNoise);
+	  radius = model->class->modelRadius (model->params, nSigmaLim * roughNoise);
 	  radius = PS_MAX (radius,  1.0);
 	  radius = PS_MIN (radius, 50.0);