diff --git a/cime_config/config_pes.xml b/cime_config/config_pes.xml
index 93f6e2dda8..4ebaf50c7a 100644
--- a/cime_config/config_pes.xml
+++ b/cime_config/config_pes.xml
@@ -161,14 +161,14 @@
 	  <ntasks_cpl>-4</ntasks_cpl>
 	</ntasks>
 	<nthrds>
-	  <nthrds_atm>2</nthrds_atm>
-	  <nthrds_lnd>2</nthrds_lnd>
-	  <nthrds_rof>2</nthrds_rof>
-	  <nthrds_ice>2</nthrds_ice>
-	  <nthrds_ocn>2</nthrds_ocn>
-	  <nthrds_glc>2</nthrds_glc>
-	  <nthrds_wav>2</nthrds_wav>
-	  <nthrds_cpl>2</nthrds_cpl>
+	  <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>