diff --git a/registration-processor/registration-processor-external-stage/Dockerfile b/registration-processor/registration-processor-external-stage/Dockerfile
index f445971d43..de1a82ad00 100644
--- a/registration-processor/registration-processor-external-stage/Dockerfile
+++ b/registration-processor/registration-processor-external-stage/Dockerfile
@@ -62,7 +62,7 @@ RUN apk -q update \
 && addgroup -g ${container_user_gid} ${container_user_group} \
 && adduser -s /bin/sh -u ${container_user_uid} -G ${container_user_group} -h /home/${container_user} --disabled-password ${container_user} \
 && addgroup sudo \
-&& adduser ${container_user} sudo${container_user}
+&& adduser ${container_user} sudo
 
 # set working directory for the user
 WORKDIR /home/${container_user}