diff --git a/library/scan_insights.py b/library/scan_insights.py
index dedd567..917b81b 100755
--- a/library/scan_insights.py
+++ b/library/scan_insights.py
@@ -41,7 +41,9 @@ def get_system_id(filname):
             pass
         finally:
             f.close()
-            return system_id.strip()
+            if system_id:
+                system_id = system_id.strip()
+            return system_id
 
 
 def main():