diff --git a/firefox/Dockerfile b/firefox/Dockerfile
index 32d279bb4..cd62b6d42 100644
--- a/firefox/Dockerfile
+++ b/firefox/Dockerfile
@@ -16,7 +16,7 @@ RUN \
 
 RUN \
     # Allow UID and GID setting
-    && sed -i 's/bash/bashio/g' /etc/cont-init.d/10-adduser \
+    sed -i 's/bash/bashio/g' /etc/cont-init.d/10-adduser \
     && sed -i 's/{PUID:-911}/(bashio::config "PUID")/g' /etc/cont-init.d/10-adduser \
     && sed -i 's/{PGID:-911}/(bashio::config "PGID")/g' /etc/cont-init.d/10-adduser