diff --git a/scripts/Dockerfile b/scripts/Dockerfile
index e8a52466a6e369..93f152bd92a91e 100644
--- a/scripts/Dockerfile
+++ b/scripts/Dockerfile
@@ -7,7 +7,7 @@
 FROM ubuntu:22.04
 
 # Fix locale to avoid warnings:
-ENV LANG en_US.UTF-8
+ENV LANG=en_US.UTF-8
 
 # Needed for setup:
 COPY ./llvm-snapshot.gpg.key ./openjdk-r-ppa.gpg ./properties.sh ./setup-android-sdk.sh ./setup-cgct.sh ./setup-ubuntu.sh /tmp/