Index: trunk/Ohana/src/opihi/cmd.astro/fitplx_irls.c
===================================================================
--- trunk/Ohana/src/opihi/cmd.astro/fitplx_irls.c	(revision 39294)
+++ trunk/Ohana/src/opihi/cmd.astro/fitplx_irls.c	(revision 39333)
@@ -329,4 +329,6 @@
   converged = FALSE;
   iterations = 0;
+  sigma_hat = 0.0;
+
   do {
     if (VERBOSE == 2) {