diff --git a/src/nf_modules/samtools/main.nf b/src/nf_modules/samtools/main.nf
index a0f44cf17c8cb1ea98a5b52626a229379a5ed583..265f6c10798b740f5eab2235b29be78f10e0ce1f 100644
--- a/src/nf_modules/samtools/main.nf
+++ b/src/nf_modules/samtools/main.nf
@@ -63,7 +63,7 @@ process index_bam {
 
   output:
     tuple val(file_id), path(bam), emit: bam
-    tuple val(file_id), path("*.bam*"), emit: bam_idx
+    tuple val(file_id), path("*.bam.bai"), emit: bam_idx
 
   script:
 """