diff --git a/openbis_all/source/bash/install-servers.sh b/openbis_all/source/bash/install-servers.sh
index 61f03cd66fdb5dea15017c238ca6888f57010ff7..4714e83eeec1b63a0e8dbe62653517516462e445 100755
--- a/openbis_all/source/bash/install-servers.sh
+++ b/openbis_all/source/bash/install-servers.sh
@@ -42,7 +42,7 @@ rm -rf "$OPENBIS_DSS"
 echo "unzip openBIS-server*.zip"
 unzip -qu openBIS-server*.zip -d "$SERVERS"
 echo "unzip datastore_server-*.zip"
-unzip -qu datastore_server-*.zip -d "$SERVERS" 
+unzip -quo datastore_server-*.zip -d "$SERVERS" 
 for file in datastore_server_plugin-*.zip; do 
 	if [ -f $file ]; then 
     echo "unzip $file"