diff --git a/src/bin/smiley.rs b/src/bin/smiley.rs
index 827d1e2..e2633a1 100644
--- a/src/bin/smiley.rs
+++ b/src/bin/smiley.rs
@@ -6,9 +6,9 @@ use bitsy_parser::image::Image;
 /// replaces the player avatar with a smiley face.
 fn main() {
     let input_file = env::args().nth(1)
-        .expect("No game data specified. Usage: `invert infile outfile`");
+        .expect("No input path specified. Usage: `smiley infile outfile`");
     let output_file = env::args().nth(2)
-        .expect("No game data specified. Usage: `invert infile outfile`");
+        .expect("No output path specified. Usage: `smiley infile outfile`");
 
     let mut game = Game::from(fs::read_to_string(input_file).unwrap());