diff --git a/reversal/tokeniser.go b/reversal/tokeniser.go
index 730e64b..f18e29d 100644
--- a/reversal/tokeniser.go
+++ b/reversal/tokeniser.go
@@ -617,7 +617,7 @@ func (t *Tokeniser) MatchArticle(word string) (string, bool) {
 	}
 	if t.isFrenchLanguage() {
 		switch lower {
-		case "l'", "l’", "d'", "d’", "j'", "j’", "m'", "m’", "t'", "t’", "s'", "s’", "n'", "n’", "c'", "c’", "qu'", "qu’", "les":
+		case "l'", "l’", "d'", "d’", "j'", "j’", "m'", "m’", "t'", "t’", "s'", "s’", "n'", "n’", "c'", "c’", "qu'", "qu’", "les", "au", "aux", "du":
 			return "definite", true
 		case "un", "une", "des":
 			return "indefinite", true
diff --git a/reversal/tokeniser_test.go b/reversal/tokeniser_test.go
index 44fae39..2e4bae2 100644
--- a/reversal/tokeniser_test.go
+++ b/reversal/tokeniser_test.go
@@ -296,6 +296,9 @@ func TestTokeniser_MatchArticle_FrenchExtended(t *testing.T) {
 		{"L'", "definite", true},
 		{"L’", "definite", true},
 		{"les", "definite", true},
+		{"au", "definite", true},
+		{"aux", "definite", true},
+		{"du", "definite", true},
 		{"des", "indefinite", true},
 		{"l'enfant", "", false},
 	}
@@ -358,6 +361,17 @@ func TestTokeniser_Tokenise_FrenchElision(t *testing.T) {
 	if tokens[1].Lower != "enfant" {
 		t.Fatalf("tokens[1].Lower = %q, want %q", tokens[1].Lower, "enfant")
 	}
+
+	tokens = tok.Tokenise("au serveur")
+	if len(tokens) != 2 {
+		t.Fatalf("Tokenise(%q) returned %d tokens, want 2", "au serveur", len(tokens))
+	}
+	if tokens[0].Type != TokenArticle {
+		t.Fatalf("tokens[0].Type = %v, want TokenArticle", tokens[0].Type)
+	}
+	if tokens[0].ArtType != "definite" {
+		t.Fatalf("tokens[0].ArtType = %q, want %q", tokens[0].ArtType, "definite")
+	}
 }
 
 func TestTokeniser_Tokenise(t *testing.T) {