@@ -97,10 +97,11 @@
 (define *db-multi-sync-mutex* (make-mutex))      ;; protect access to *db-sync-in-progress*, *db-last-sync*
 ;; task db
 (define *task-db*             #f) ;; (vector db path-to-db)
 (define *db-access-allowed*   #t) ;; flag to allow access
 (define *db-access-mutex*     (make-mutex))
+(define *db-transaction-mutex* (make-mutex))
 (define *db-cache-path*       #f)
 
 ;; SERVER
 (define *my-client-signature* #f)
 (define *transport-type*    'http)             ;; override with [server] transport http|rpc|nmsg