diff --git a/trusty/apploader/apploader.cpp b/trusty/apploader/apploader.cpp
index 5d5d882..8ab6303 100644
--- a/trusty/apploader/apploader.cpp
+++ b/trusty/apploader/apploader.cpp
@@ -43,7 +43,7 @@
 
 static const char* dev_name = kTrustyDefaultDeviceName;
 
-static const char* _sopts = "hs";
+static const char* _sopts = "hD:";
 static const struct option _lopts[] = {
         {"help", no_argument, 0, 'h'},
         {"dev", required_argument, 0, 'D'},