diff --git a/macs2.wdl b/macs2.wdl
index cccd3a857e0c1c794265e504836ed81313167fe7..fd7ec02c2819e8f283ca72776299c67ce010b21d 100644
--- a/macs2.wdl
+++ b/macs2.wdl
@@ -9,7 +9,7 @@ task PeakCalling {
     command {
         set -e -o pipefail
         ${preCommand}
-        macs2 callpeaks \
+        macs2 callpeak \
         --treatment ${sep = ' ' bamFiles} \
         --outdir ${outDir} \
         --name ${sampleName}