diff --git a/examples/prd/README b/examples/prd/README
index 7733df9a78..7615c2b7f5 100644
--- a/examples/prd/README
+++ b/examples/prd/README
@@ -1,3 +1,5 @@
-run this example as:
+Run this example as:
 
 mpirun -np 4 lmp_linux -partition 4x1 -in in.prd
+
+You should be able to use any number of replicas >= 3.