diff --git a/examples/syncat.rs b/examples/syncat.rs
index cb6af2f5..f33f1312 100644
--- a/examples/syncat.rs
+++ b/examples/syncat.rs
@@ -39,7 +39,7 @@ fn main() {
 
     let matches = match opts.parse(&args[1..]) {
         Ok(m) => { m }
-        Err(f) => { panic!(f.to_string()) }
+        Err(f) => { panic!("{}", f.to_string()) }
     };
 
     let no_newlines = matches.opt_present("no-newlines");
diff --git a/examples/syntest.rs b/examples/syntest.rs
index aa4abc30..13e1d6ce 100644
--- a/examples/syntest.rs
+++ b/examples/syntest.rs
@@ -274,7 +274,7 @@ fn main() {
 
     let matches = match opts.parse(&args[1..]) {
         Ok(m) => { m }
-        Err(f) => { panic!(f.to_string()) }
+        Err(f) => { panic!("{}", f.to_string()) }
     };
 
     let tests_path = if matches.free.len() < 1 {