diff --git a/modules/gatk4/mergevcfs/main.nf b/modules/gatk4/mergevcfs/main.nf
index 964c1a3b..35930a6e 100644
--- a/modules/gatk4/mergevcfs/main.nf
+++ b/modules/gatk4/mergevcfs/main.nf
@@ -13,6 +13,7 @@ process GATK4_MERGEVCFS {
 
     output:
     tuple val(meta), path('*.vcf.gz'), emit: vcf
+    tuple val(meta), path("*.tbi")   , emit: tbi
     path  "versions.yml"             , emit: versions
 
     when:
diff --git a/modules/gatk4/mergevcfs/meta.yml b/modules/gatk4/mergevcfs/meta.yml
index 8d4123d9..6110e944 100644
--- a/modules/gatk4/mergevcfs/meta.yml
+++ b/modules/gatk4/mergevcfs/meta.yml
@@ -35,6 +35,12 @@ output:
       type: file
       description: merged vcf file
       pattern: "*.vcf.gz"
+  - tbi:
+      type: file
+      description: index files for the merged vcf files
+      pattern: "*.tbi"
+
+
   - versions:
       type: file
       description: File containing software versions