diff --git a/docker/Dockerfile.nakaolab.test b/docker/Dockerfile.nakaolab.test
index 0a194b18d7..3fa95afd88 100644
--- a/docker/Dockerfile.nakaolab.test
+++ b/docker/Dockerfile.nakaolab.test
@@ -10,7 +10,7 @@ RUN /bin/sh oaienv && \
     cd cmake_targets && \
     mkdir -p log && \
     ./build_oai -c --ninja \
-      --gNB --RU --nrUE -w SIMU\
+      --gNB --RU --nrUE -w SIMU \
       --build-lib "telnetsrv" \
       -w USRP -t Ethernet \
       --build-e2 --cmake-opt -DKPM_VERSION=KPM_V3_00 --cmake-opt -DE2AP_VERSION=E2AP_V3 \