diff --git a/src/backends/speech_dispatcher.rs b/src/backends/speech_dispatcher.rs
index afbbba3..7fa1fbe 100644
--- a/src/backends/speech_dispatcher.rs
+++ b/src/backends/speech_dispatcher.rs
@@ -75,6 +75,7 @@ impl Backend for SpeechDispatcher {
             pitch: true,
             volume: true,
             is_speaking: true,
+            voices: false,
             utterance_callbacks: true,
         }
     }
diff --git a/src/backends/web.rs b/src/backends/web.rs
index a43b2c8..c2d6ddd 100644
--- a/src/backends/web.rs
+++ b/src/backends/web.rs
@@ -47,6 +47,7 @@ impl Backend for Web {
             pitch: true,
             volume: true,
             is_speaking: true,
+            voices: true,
             utterance_callbacks: true,
         }
     }
diff --git a/src/backends/winrt.rs b/src/backends/winrt.rs
index 98826e6..d22d6a3 100644
--- a/src/backends/winrt.rs
+++ b/src/backends/winrt.rs
@@ -140,6 +140,7 @@ impl Backend for WinRT {
             pitch: true,
             volume: true,
             is_speaking: true,
+            voices: true,
             utterance_callbacks: true,
         }
     }