diff --git a/config_pes.xml b/config_pes.xml
index d48a0a9..4a5791c 100644
--- a/config_pes.xml
+++ b/config_pes.xml
@@ -1622,7 +1622,7 @@
   <grid name="a%0.9x1.25.+l%0.9x1.25.+oi%gx1" >
     <mach name="yellowstone">
       <pes pesize="X2" compset="CAM.+CLM.+CICE.+POP.+">
-	<PES_PER_NODE>16</PES_PER_NODE>
+	<MAX_MPITASKS_PER_NODE>16</MAX_MPITASKS_PER_NODE>
 	<MAX_TASKS_PER_NODE>16</MAX_TASKS_PER_NODE>
 	<comment>none</comment>
 	<ntasks>
@@ -1657,7 +1657,7 @@
 	</rootpe>
       </pes>
       <pes pesize="X1" compset="CAM.+CLM.+CICE.+POP.+">
-	<PES_PER_NODE>16</PES_PER_NODE>
+	<MAX_MPITASKS_PER_NODE>16</MAX_MPITASKS_PER_NODE>
 	<MAX_TASKS_PER_NODE>16</MAX_TASKS_PER_NODE>
 	<comment>none</comment>
 	<ntasks>