diff --git a/cmds/servicemanager/bctest.c b/cmds/servicemanager/bctest.c
index ff5aced..ee49679 100644
--- a/cmds/servicemanager/bctest.c
+++ b/cmds/servicemanager/bctest.c
@@ -62,6 +62,10 @@
     void *svcmgr = BINDER_SERVICE_MANAGER;
 
     bs = binder_open(128*1024);
+    if (!bs) {
+        fprintf(stderr, "failed to open binder driver\n");
+        return -1;
+    }
 
     argc--;
     argv++;