diff --git a/lex.go b/lex.go
index 43b551e..2e38ecb 100644
--- a/lex.go
+++ b/lex.go
@@ -27,5 +27,5 @@ func lexMode(v string) lexModeValue {
 		}
 	}
 
-	return lexModeUnknown
+	return lexModeHcl
 }
diff --git a/lex_test.go b/lex_test.go
index a2c5cb5..f7ee378 100644
--- a/lex_test.go
+++ b/lex_test.go
@@ -9,6 +9,10 @@ func TestLexMode(t *testing.T) {
 		Input string
 		Mode  lexModeValue
 	}{
+		{
+			"",
+			lexModeHcl,
+		},
 		{
 			"foo",
 			lexModeHcl,