diff --git a/cool-retro-term/Dockerfile b/cool-retro-term/Dockerfile
index 8eca0d6..e90446a 100644
--- a/cool-retro-term/Dockerfile
+++ b/cool-retro-term/Dockerfile
@@ -43,7 +43,7 @@ USER root
 #             files created by the host, causing sound to stop working.
 #             To fix this, we either want to disable the shm or mount /dev/shm
 #             in read-only mode when starting the container.
-RUN echo "enable-shm = no" | sudo tee -a /etc/pulse/client.conf
+RUN echo "enable-shm = no" | tee -a /etc/pulse/client.conf
 
 COPY launch /launch
 ENTRYPOINT [ "bash", "/launch" ]