diff --git a/meilisearch-http/src/index/mod.rs b/meilisearch-http/src/index/mod.rs
index cb942a7b8..56958760a 100644
--- a/meilisearch-http/src/index/mod.rs
+++ b/meilisearch-http/src/index/mod.rs
@@ -84,6 +84,8 @@ impl Index {
             .unwrap_or_else(BTreeSet::new);
         let distinct_field = self.distinct_field(&txn)?.map(String::from);
 
+        // in milli each word in the synonyms map were split on their separator. Since we lost
+        // this information we are going to put space between words.
         let synonyms = self
             .synonyms(&txn)?
             .iter()
diff --git a/meilisearch-http/src/index/updates.rs b/meilisearch-http/src/index/updates.rs
index 3e31cd75c..fc475aa4d 100644
--- a/meilisearch-http/src/index/updates.rs
+++ b/meilisearch-http/src/index/updates.rs
@@ -277,14 +277,14 @@ impl Index {
         if let Some(ref stop_words) = settings.stop_words {
             match stop_words {
                 Some(stop_words) => builder.set_stop_words(stop_words.clone()),
-                _ => builder.reset_stop_words(),
+                None => builder.reset_stop_words(),
             }
         }
 
         if let Some(ref synonyms) = settings.synonyms {
             match synonyms {
                 Some(synonyms) => builder.set_synonyms(synonyms.clone().into_iter().collect()),
-                _ => builder.reset_synonyms(),
+                None => builder.reset_synonyms(),
             }
         }