diff --git a/rna-seq.nf b/rna-seq.nf
index e7fb87eeda913dcdd6a65b940df3fa55de14b37c..0adcc63f7b7a1a540b2be56a2e94b86376e617bf 100644
--- a/rna-seq.nf
+++ b/rna-seq.nf
@@ -2900,7 +2900,7 @@ executionRunRID_preFailseqwho_fl.splitCsv(sep: ",", header: false).separate(
 )
 
 
-failExecutionRunRID = executionRunRID_fail.ifEmpty('').mix(executionRunRID_preFail.ifEmpty('').mix(executionRunRID_preFailseqwho.ifEmpty('')).filter { it != "" }
+failExecutionRunRID = executionRunRID_fail.ifEmpty('').mix(executionRunRID_preFail.ifEmpty('').mix(executionRunRID_preFailseqwho.ifEmpty(''))).filter { it != "" }
 
 /* 
  * failExecutionRun: fail the execution run