diff --git a/cime/config/e3sm/allactive/config_pesall.xml b/cime/config/e3sm/allactive/config_pesall.xml
index 2cc7a37d7b38..52ab8ab6f423 100644
--- a/cime/config/e3sm/allactive/config_pesall.xml
+++ b/cime/config/e3sm/allactive/config_pesall.xml
@@ -662,6 +662,43 @@
       </pes>
     </mach>
   </grid>
+  <grid name="a%ne4np4.pg2">
+    <mach name="melvin">
+      <pes compset="any" pesize="any">
+        <comment>ne4np4pg2 compset on melvin</comment>
+        <ntasks>
+          <ntasks_atm>48</ntasks_atm>
+          <ntasks_lnd>48</ntasks_lnd>
+          <ntasks_rof>48</ntasks_rof>
+          <ntasks_ice>48</ntasks_ice>
+          <ntasks_ocn>48</ntasks_ocn>
+          <ntasks_glc>48</ntasks_glc>
+          <ntasks_wav>48</ntasks_wav>
+          <ntasks_cpl>48</ntasks_cpl>
+        </ntasks>
+        <nthrds>
+          <nthrds_atm>1</nthrds_atm>
+          <nthrds_lnd>1</nthrds_lnd>
+          <nthrds_rof>1</nthrds_rof>
+          <nthrds_ice>1</nthrds_ice>
+          <nthrds_ocn>1</nthrds_ocn>
+          <nthrds_glc>1</nthrds_glc>
+          <nthrds_wav>1</nthrds_wav>
+          <nthrds_cpl>1</nthrds_cpl>
+        </nthrds>
+        <rootpe>
+          <rootpe_atm>0</rootpe_atm>
+          <rootpe_lnd>0</rootpe_lnd>
+          <rootpe_rof>0</rootpe_rof>
+          <rootpe_ice>0</rootpe_ice>
+          <rootpe_ocn>0</rootpe_ocn>
+          <rootpe_glc>0</rootpe_glc>
+          <rootpe_wav>0</rootpe_wav>
+          <rootpe_cpl>0</rootpe_cpl>
+        </rootpe>
+      </pes>
+    </mach>
+  </grid>
   <grid name="a%ne30np4_">
     <mach name="edison">
       <pes compset="any" pesize="any">