diff --git a/src/bin/client-demo.rs b/src/bin/client-demo.rs
old mode 100644
new mode 100755
index 62e1f4d8a..8efe00116
--- a/src/bin/client-demo.rs
+++ b/src/bin/client-demo.rs
@@ -211,7 +211,7 @@ fn main() {
         threads = t.to_string().parse().expect("integer");
     }
 
-    if let Some(n) = matches.value_of("nodes") {
+    if let Some(n) = matches.value_of("num_nodes") {
         num_nodes = n.to_string().parse().expect("integer");
     }