diff --git a/sbysrc/sby_engine_itp.py b/sbysrc/sby_engine_itp.py
index ce2e21c..61d201c 100644
--- a/sbysrc/sby_engine_itp.py
+++ b/sbysrc/sby_engine_itp.py
@@ -43,9 +43,12 @@ def run(mode, task, engine_idx, engine):
     # Parse options
     args = engine[1:]
 
+    DEFAULT_BOUND = 20
+    DEFAULT_SKIP = 0
+
     # Defaults from task options
-    bound = getattr(task, "opt_depth", 20) or 20
-    skip  = getattr(task, "opt_skip",  0)  or 0
+    bound = getattr(task, "opt_depth", DEFAULT_BOUND) or DEFAULT_BOUND
+    skip  = getattr(task, "opt_skip",  DEFAULT_SKIP)  or DEFAULT_SKIP
 
     # Positional args override: itp [bound] [skip]
     if len(args) > 0: