diff --git a/src/nf_modules/g2gtools/main.nf b/src/nf_modules/g2gtools/main.nf
index d1266cf6a3a292e078c9730c2e7c5394115cc8a1..a2d4f37becf88cf0aab67a6a936774ce1fc7ed6b 100644
--- a/src/nf_modules/g2gtools/main.nf
+++ b/src/nf_modules/g2gtools/main.nf
@@ -10,7 +10,7 @@ process vci_build {
     tuple val(file_id), path(vcf)
     tuple val(ref_id), path(fasta)
   output:
-    tuple val(file_id), path("*.vci"), path("*.tbi"), emit: vci
+    tuple val(file_id), path("*.vci.gz"), path("*.tbi"), emit: vci
     tuple val(file_id), path("*_report.txt"), emit: report
   script:
   input_vcf = ""