diff --git a/protocols/ircs2s_common.py b/protocols/ircs2s_common.py
index 0feef81..65c8d6e 100644
--- a/protocols/ircs2s_common.py
+++ b/protocols/ircs2s_common.py
@@ -2,6 +2,8 @@
 ircs2s_common.py: Common base protocol class with functions shared by TS6 and P10-based protocols.
 """
 
+import time
+
 from pylinkirc.classes import Protocol
 from pylinkirc.log import log