diff --git a/geomagio/Controller.py b/geomagio/Controller.py
index c47a7a7f30f9f713bed3be856390ce7b39b12620..817598fedd5877e88977e7d59ea0f82891e921ac 100644
--- a/geomagio/Controller.py
+++ b/geomagio/Controller.py
@@ -403,7 +403,7 @@ class Controller(object):
         starttime = output_timeseries[0].stats.starttime
         endtime = output_timeseries[0].stats.endtime
         print(
-            "checking gaps",
+            "checking output gaps",
             starttime,
             endtime,
             output_observatory,
@@ -451,6 +451,9 @@ class Controller(object):
                 "processing",
                 gap_starttime,
                 gap_endtime,
+                observatory,
+                input_channels,
+                "-->",
                 output_observatory,
                 output_channels,
                 file=sys.stderr,