diff --git a/elasticsearch/Dockerfile b/elasticsearch/Dockerfile
index 69949670..c986571a 100755
--- a/elasticsearch/Dockerfile
+++ b/elasticsearch/Dockerfile
@@ -9,7 +9,10 @@ ARG ES_VERSION=5.5.0
 ADD https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-$ES_VERSION.tar.gz /tmp
 # need to adapt to both Docker's new remote-unpack-ADD behavior and the old behavior
 RUN cd /usr/share && \
-  if [ -f /tmp/elasticsearch-$ES_VERSION.tar.gz ]; then tar xf /tmp/es.tgz; else mv /tmp/elasticsearch-${ES_VERSION} /usr/share; fi && \
+  if [ -f /tmp/elasticsearch-$ES_VERSION.tar.gz ]; then \
+    tar xf /tmp/elasticsearch-$ES_VERSION.tar.gz; \
+    else mv /tmp/elasticsearch-${ES_VERSION} /usr/share; \
+    fi && \
   rm -f /tmp/elasticsearch-$ES_VERSION.tar.gz
 
 EXPOSE 9200 9300