diff --git a/bin/attach b/bin/attach
index 338cf1530..c8a6e31ef 100755
--- a/bin/attach
+++ b/bin/attach
@@ -10,4 +10,4 @@ IFS='/' read -ra ADDR <<< "$BINDIR"
 POS=$((${#ADDR[@]} - 2))
 DIR=${ADDR[$POS]}
 
-docker exec -it "${DIR}_$1_1" /bin/bash
+docker exec -it "${DIR}-$1-1" /bin/bash || docker exec -it "${DIR}-$1-1" /bin/sh