diff --git a/require-ess/tools/promptE3Env.bash b/require-ess/tools/promptE3Env.bash
index d226dc7666e8af542be44d4b58cc11f329b80d74..affd0ff2510e1b568fa7408256ccbdd889b763ad 100644
--- a/require-ess/tools/promptE3Env.bash
+++ b/require-ess/tools/promptE3Env.bash
@@ -11,7 +11,7 @@
 DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 source $DIR/setE3Env.bash 
 
-IFS='-' read -ra base <<< "$EPICS_BASE"
-PS1=(EPICS-${base[1]})$PS1
+IFS='/' read -ra base <<< "$EPICS_BASE"
+PS1=(EPICS-${base[2]})$PS1