diff --git a/src/tscut/tscut.py b/src/tscut/tscut.py
index 7eada87..6412d23 100755
--- a/src/tscut/tscut.py
+++ b/src/tscut/tscut.py
@@ -55,6 +55,7 @@ from tscut.tools.timeframe import (
     compare_time_interval,
     parse_time_interval
 )
+from tscut.tools.discovery import check_required_tools
 
 
 # Useful SPS/PPS discussion.