diff --git a/workflow/rna-seq.nf b/workflow/rna-seq.nf
index 6943215b23079e414e1f3d38d906cf8691999aea..31f7ac3e5f14bc6d572a5559605f229d07c2f3e5 100644
--- a/workflow/rna-seq.nf
+++ b/workflow/rna-seq.nf
@@ -2023,7 +2023,7 @@ process aggrQC {
     fi
     if [ "${params.spikeForce}" == "" ]
     then
-      input=\$(echo \${input}"${spikeI}\t-\t-\t-\t-"")
+      input=\$(echo \${input}"${spikeI}\t-\t-\t-\t-")
     else
       input=\$(echo \${input}"${spikeI} (FORCED)\t-\t-\t-\t-" >> metadata.tsv
     fi