diff --git a/vegas.mm b/vegas.mm
index 770373984d60d1743857c557d589ec8d17176113..1135d8b98e2026c29e1dc27c106656004baaaeb4 100644
--- a/vegas.mm
+++ b/vegas.mm
@@ -328,7 +328,15 @@ ScalePlot[a_,s_]:={1/s,s,s}#&/@a
 ScalePlot[a_,sx_,sy_]:={1/sx,sy,sy}#&/@a
 
 
-MergeBins[plot_, n_] := {
+MergeBins[{{DirectedInfinity[-1], u_,e_}, stuff___}, n_] := Prepend[
+    MergeBins[{stuff}, n],
+    {DirectedInfinity[-1], u,e}
+]
+MergeBins[{stuff___, {DirectedInfinity[+1], o_,e_}}, n_] := Append[
+    MergeBins[{stuff}, n],
+    {DirectedInfinity[+1], o,e}
+]
+MergeBins[plot_, n_]/;FreeQ[plot,DirectedInfinity|Infinity] := {
     Plus @@ #[[;; , 1]]/n, Plus @@ #[[;; , 2]]/n, Sqrt[
     Plus @@ (#[[;; , 3]]^2)]/n
 } & /@ Partition[plot, n]