diff --git a/docker/ubuntu/Dockerfile b/docker/ubuntu/Dockerfile
index 8b38a2758b3..a9b53edb3e8 100644
--- a/docker/ubuntu/Dockerfile
+++ b/docker/ubuntu/Dockerfile
@@ -150,7 +150,7 @@ RUN (echo "Install Python" \
     && rm -r /root/.cache \
     )
 
-# ers are encouraged to fetch vertical datums and store into PROJ dir, e.g.:
+# Users are encouraged to fetch vertical datums and store into PROJ dir, e.g.:
 # WORKDIR /src
 # RUN mkdir vdatum && \
 #     cd vdatum && \