diff --git a/script/gspylib/common/Common.py b/script/gspylib/common/Common.py
index a1a5e68b3a1bedbe8ba9f8393a91fdf4c5122b90..ea886712c6b29690015075603e9f372f3985f99b 100644
--- a/script/gspylib/common/Common.py
+++ b/script/gspylib/common/Common.py
@@ -3259,7 +3259,7 @@ class DefaultValue():
         try:
             if nodes:
                 logger.debug(
-                    "check if the nodes %s step is %s " (nodes, step))
+                    "check if the nodes %s step is %s " % (nodes, step))
             else:
                 logger.debug(
                     "check if all the nodes step is %s" % step)