diff --git a/install/config/docker.sh b/install/config/docker.sh
index 006048551b..4835f0a052 100644
--- a/install/config/docker.sh
+++ b/install/config/docker.sh
@@ -1 +1,8 @@
 usermod -aG docker "$OMARCHY_INSTALL_USER"
+
+# Ensure sudo works in cross-platform Docker image builds
+for src in /usr/lib/binfmt.d/qemu-*-static.conf; do
+  dst="/etc/binfmt.d/$(basename "$src")"
+  install -Dm644 "$src" "$dst"
+  sed -i 's/:FP$/:OCF/' "$dst"
+done