diff --git a/src/remote_ops.py b/src/remote_ops.py
index c2e2164..5f7fbce 100644
--- a/src/remote_ops.py
+++ b/src/remote_ops.py
@@ -690,13 +690,14 @@ def is_port_free(self, number: int) -> bool:
         assert number >= 0
         assert number <= 65535  # OK?
 
-        # grep -q returns 0 if a listening socket on that port is found
         port_hex = format(number, '04X')
 
         #   sl  local_address rem_address   st tx_queue rx_queue tr tm->when retrnsmt ...
         #  137: 0A01A8C0:EC08 1DA2A959:01BB 01 00000000:00000000 02:00000000 00000000 ...
         C_REGEXP = r"^\s*[0-9]+:\s*[0-9a-fA-F]{8}:" + re.escape(port_hex) + r"\s+[0-9a-fA-F]{8}:[0-9a-fA-F]{4}\s+"
 
+        # grep -q returns 0 if a listening socket on that port is found
+
         # Search /proc/net/tcp for any entry with this port
         # NOTE: grep requires quote string with regular expression
         # TODO: added a support for tcp/ip v6