diff --git a/windows/Dockerfile b/windows/Dockerfile
index 316cbebd0..452e78fe4 100644
--- a/windows/Dockerfile
+++ b/windows/Dockerfile
@@ -20,8 +20,8 @@ SHELL ["powershell", "-Command"]
 ARG WINDOWS_VERSION
 ENV WINDOWS_VERSION=${WINDOWS_VERSION:-1809}
 
-ARG TARGET_ARCH
-ENV TARGET_ARCH=${TARGET_ARCH:-x64}
+ARG DD_TARGET_ARCH
+ENV TARGET_ARCH=${DD_TARGET_ARCH:-x64}
 
 # Chocolatey package versions
 ENV GIT_VERSION "2.26.2"