diff --git a/dlls/windows.media.speech/main.c b/dlls/windows.media.speech/main.c
index c358b991be2..31847a2eb6a 100644
--- a/dlls/windows.media.speech/main.c
+++ b/dlls/windows.media.speech/main.c
@@ -119,7 +119,8 @@ static HRESULT STDMETHODCALLTYPE vector_view_voice_information_GetAt(
         IVectorView_VoiceInformation *iface, UINT32 index, IVoiceInformation **value)
 {
     FIXME("iface %p, index %#x, value %p stub!\n", iface, index, value);
-    return S_OK;
+    *value = NULL;
+    return E_BOUNDS;
 }
 
 static HRESULT STDMETHODCALLTYPE vector_view_voice_information_get_Size(
@@ -131,10 +132,11 @@ static HRESULT STDMETHODCALLTYPE vector_view_voice_information_get_Size(
 }
 
 static HRESULT STDMETHODCALLTYPE vector_view_voice_information_IndexOf(
-        IVectorView_VoiceInformation *iface, IVoiceInformation *element, UINT32 *index, BOOLEAN *value)
+        IVectorView_VoiceInformation *iface, IVoiceInformation *element, UINT32 *index, BOOLEAN *found)
 {
-    FIXME("iface %p, element %p, index %p, value %p stub!\n", iface, element, index, value);
-    *value = FALSE;
+    FIXME("iface %p, element %p, index %p, found %p stub!\n", iface, element, index, found);
+    *index = 0;
+    *found = FALSE;
     return S_OK;
 }
 
diff --git a/dlls/windows.media.speech/tests/speech.c b/dlls/windows.media.speech/tests/speech.c
index 770562e9d82..1c48c5bf933 100644
--- a/dlls/windows.media.speech/tests/speech.c
+++ b/dlls/windows.media.speech/tests/speech.c
@@ -99,6 +99,11 @@ static void test_SpeechSynthesizer(void)
     ok(hr == S_OK, "IVectorView_VoiceInformation_get_Size voices failed, hr %#x\n", hr);
     todo_wine ok(size != 0 && size != 0xdeadbeef, "IVectorView_VoiceInformation_get_Size returned %u\n", size);
 
+    voice = (IVoiceInformation *)0xdeadbeef;
+    hr = IVectorView_VoiceInformation_GetAt(voices, size, &voice);
+    ok(hr == E_BOUNDS, "IVectorView_VoiceInformation_GetAt failed, hr %#x\n", hr);
+    ok(voice == NULL, "IVectorView_VoiceInformation_GetAt returned %p\n", voice);
+
     hr = IVectorView_VoiceInformation_GetMany(voices, size, 1, &voice, &size);
     ok(hr == S_OK, "IVectorView_VoiceInformation_GetMany failed, hr %#x\n", hr);
     ok(size == 0, "IVectorView_VoiceInformation_GetMany returned count %u\n", size);