diff --git a/crates/ai/src/diff.rs b/crates/ai/src/diff.rs
index 0f4f328602065a20136f5618b34b62d70740710d..3ba0d005e77d5e7c4e5ff93da930f7502962ef48 100644
--- a/crates/ai/src/diff.rs
+++ b/crates/ai/src/diff.rs
@@ -107,7 +107,11 @@ impl Diff {
                 let insertion_score = self.scores.get(i, j - 1) + Self::INSERTION_SCORE;
                 let deletion_score = self.scores.get(i - 1, j) + Self::DELETION_SCORE;
                 let equality_score = if self.old[i - 1] == self.new[j - 1] {
-                    self.scores.get(i - 1, j - 1) + Self::EQUALITY_SCORE
+                    if self.old[i - 1] == ' ' {
+                        self.scores.get(i - 1, j - 1)
+                    } else {
+                        self.scores.get(i - 1, j - 1) + Self::EQUALITY_SCORE
+                    }
                 } else {
                     isize::MIN
                 };