diff --git a/guacamole/Dockerfile b/guacamole/Dockerfile
index 11d49d089..5f4c8dd2d 100644
--- a/guacamole/Dockerfile
+++ b/guacamole/Dockerfile
@@ -38,8 +38,8 @@ RUN \
     && sed -i 's|/config|/config/addons_config/guacamole|g' /etc/services.d/*/run \
     \
     # Enable extensions
-    && sed -i 's|#!/usr/bin/with-contenv sh|#!/usr/bin/with-contenv bashio|g' /etc/cont-init.d/50-extensions \
-    && sed -i 's|$EXTENSIONS|$(bashio::config "EXTENSIONS")|g' /etc/cont-init.d/50-extensions \
+    && sed -i 's|#!/usr/bin/with-contenv sh|#!/usr/bin/with-contenv bashio|g' /etc/cont-init.d/50-extensions.sh \
+    && sed -i 's|$EXTENSIONS|$(bashio::config "EXTENSIONS")|g' /etc/cont-init.d/50-extensions.sh \
     \
     # Correct transfer
     && sed -i 's|cp -rn /app/guacamole|cp -rn /app/guacamole/*|g' /etc/cont-init.d/* \