diff --git a/CEP/Pipeline/recipes/sip/nodes/dppp.py b/CEP/Pipeline/recipes/sip/nodes/dppp.py
index 239b9532eb1da7acb893b6cb5f3f16d9fad89c2e..6a8d4d205c0d36438de1190bbfa11f1e7df85a5a 100644
--- a/CEP/Pipeline/recipes/sip/nodes/dppp.py
+++ b/CEP/Pipeline/recipes/sip/nodes/dppp.py
@@ -80,6 +80,7 @@ class dppp(LOFARnodeTCP):
                 self.logger.info(
                     "Output file %s already exists. We're done." % outfile
                 )
+                self.outputs['ok'] = True
                 return 0
 
             # Create a working copy if input and output are identical, to