diff --git a/docker/README.md b/docker/README.md
index 809d50c383af256473d10c7eef4bc9c1286d9594..05e0594e36e2b581eaec7bcdb972d6a4c1b65035 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -24,7 +24,7 @@ docker run \
 -v $DATA_DIR:/data \
 -v $OUTPUT_DIR:/output \
 -e MG="/data/$MGR1 /data/$MGR2" \
--e "MT=/data/$MTR1 MG=/data/$MTR2" \
+-e MT="/data/$MTR1 /data/$MTR2" \
 imp:latest
 ```
 * `docker run`: Run a docker container