diff --git a/common/common.sh b/common/common.sh
index 6c1522c305696144edcfb5873b6aaf810e94aef4..68341164f2b0dd243168b3166df38c2ea9d78b77 100644
--- a/common/common.sh
+++ b/common/common.sh
@@ -160,7 +160,7 @@ ensure_dbus_session() {
     local dbus_socket
 
     dbus_socket="/run/user/$UID/bus"
-    if [[ ! -e {dbus_socket} ]]; then
+    if [[ ! -e "${dbus_socket}" ]]; then
         cry "Could not find session bus..."
         return 1
     fi