diff --git a/kas-docker b/kas-docker
index e7d71ea..993b2eb 100755
--- a/kas-docker
+++ b/kas-docker
@@ -215,7 +215,7 @@ set -- ${DOCKER_ARGS}
 for var in SHELL TERM KAS_DISTRO KAS_MACHINE KAS_TARGET KAS_TASK \
            http_proxy https_proxy ftp_proxy no_proxy NO_PROXY; do
 	if [ -n "$(eval echo \$${var})" ]; then
-		set -- "$@" -e "${var}='$(eval echo \$${var})'"
+		set -- "$@" -e "${var}='$(eval echo \"\$${var}\")'"
 	fi
 done