diff --git a/src/command/unix_program.rs b/src/command/unix_program.rs
index 5d3186d..a7df9c5 100644
--- a/src/command/unix_program.rs
+++ b/src/command/unix_program.rs
@@ -40,7 +40,7 @@ impl Command for UnixProgram {
                 "{}: command not found",
                 self.command.get_program().to_str().unwrap()
             );
-            print_error(message);
+            print_error(message.as_str());
             ExitCode::not_found()
         }
     }
diff --git a/src/error.rs b/src/error.rs
index 7ffec6d..c7d3082 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,6 +1,6 @@
 use std::path::Path;
 
-pub fn print_error(message: String) {
+pub fn print_error(message: &str) {
     let name = std::env::args().next().unwrap();
     let name = Path::new(&name).file_name().unwrap().to_str().unwrap();