arm_compute v19.11
diff --git a/examples/graph_vgg16.cpp b/examples/graph_vgg16.cpp
index e8055d4..d58bf6c 100644
--- a/examples/graph_vgg16.cpp
+++ b/examples/graph_vgg16.cpp
@@ -53,6 +53,7 @@
 
         // Parse arguments
         cmd_parser.parse(argc, argv);
+        cmd_parser.validate();
 
         // Consume common parameters
         common_params = consume_common_graph_parameters(common_opts);