diff --git a/rnaseq/step5_count/snippet.sh b/rnaseq/step5_count/snippet.sh
index 6aff43a..fd3270c 100644
--- a/rnaseq/step5_count/snippet.sh
+++ b/rnaseq/step5_count/snippet.sh
@@ -22,6 +22,7 @@ BAM="${PROJECT_DIRECTORY}/step3/alignment/sample1_Aligned.sortedByCoord.out.bam"
 #   `--stranded` flag.
 htseq-count \
     --order pos \
+    -f bam \
     ${BAM} \
     ${GTF_FILE} \
-    > ${COUNT_OUTPUT}/counts.txt
\ No newline at end of file
+    > ${COUNT_OUTPUT}/counts.txt