diff --git a/scripts/rpc.py b/scripts/rpc.py
index 113fc8d38c..4522c0861f 100755
--- a/scripts/rpc.py
+++ b/scripts/rpc.py
@@ -239,7 +239,7 @@ if __name__ == "__main__":
                                        pmd=args.pmd)
     p = subparsers.add_parser('bdev_compress_set_pmd', aliases=['set_compress_pmd', 'compress_set_pmd'],
                               help='Set pmd option for a compress disk')
-    p.add_argument('-p', '--pmd', type=int, help='0 = auto-select, 1= QAT only, 2 = ISAL only')
+    p.add_argument('-p', '--pmd', type=int, help='0 = auto-select, 1= QAT only, 2 = ISAL only, 3 = mlx5_pci only')
     p.set_defaults(func=bdev_compress_set_pmd)
 
     def bdev_compress_get_orphans(args):
diff --git a/scripts/rpc/bdev.py b/scripts/rpc/bdev.py
index 41a773b1f0..f470784ce4 100644
--- a/scripts/rpc/bdev.py
+++ b/scripts/rpc/bdev.py
@@ -81,7 +81,7 @@ def bdev_compress_set_pmd(client, pmd):
     """Set pmd options for the bdev compress.
 
     Args:
-        pmd: 0 = auto-select, 1 = QAT, 2 = ISAL
+        pmd: 0 = auto-select, 1 = QAT, 2 = ISAL, 3 = mlx5_pci
     """
     params = {'pmd': pmd}