diff --git a/bencher/src/result.rs b/bencher/src/result.rs
index d5d6234..cfbca94 100644
--- a/bencher/src/result.rs
+++ b/bencher/src/result.rs
@@ -45,7 +45,11 @@ pub(crate) fn write_results(out_dir: &Path, results: Vec<MolluskComputeUnitBench
                     "--".to_string()
                 } else {
                     no_changes = false;
-                    delta.to_formatted_string(&Locale::en)
+                    if delta > 0 {
+                        format!("+{}", delta.to_formatted_string(&Locale::en))
+                    } else {
+                        delta.to_formatted_string(&Locale::en)
+                    }
                 }
             }
             None => {