diff --git a/R/ergm.stocapprox.R b/R/ergm.stocapprox.R
index 9b33541f..b644be10 100644
--- a/R/ergm.stocapprox.R
+++ b/R/ergm.stocapprox.R
@@ -79,7 +79,7 @@ ergm.stocapprox <- function(init, s, s.obs,
   if(verbose){message("Using Newton-Raphson Step ...")}
 
   v <- ergm.estimate(init=theta, model=model,
-                     statsmatrices=mcmc.list(as.mcmc(z$stats)),
+                     statsmatrices=z$stats,
                      statsmatrices.obs=NULL,
                      epsilon=control$epsilon,
                      nr.maxit=control$MCMLE.NR.maxit,