diff --git a/dlls/amstream/multimedia.c b/dlls/amstream/multimedia.c
index 5425ef42a37..82ef4822344 100644
--- a/dlls/amstream/multimedia.c
+++ b/dlls/amstream/multimedia.c
@@ -181,7 +181,11 @@ static HRESULT WINAPI multimedia_stream_GetDuration(IAMMultiMediaStream *iface,
 
     if (!mmstream->media_seeking)
         return E_NOINTERFACE;
-    return IMediaSeeking_GetDuration(mmstream->media_seeking, duration);
+
+    if (IMediaSeeking_GetDuration(mmstream->media_seeking, duration) != S_OK)
+        return S_FALSE;
+
+    return S_OK;
 }
 
 static HRESULT WINAPI multimedia_stream_Seek(IAMMultiMediaStream *iface, STREAM_TIME seek_time)
diff --git a/dlls/amstream/tests/amstream.c b/dlls/amstream/tests/amstream.c
index 6a72f3ed891..a25ae42a314 100644
--- a/dlls/amstream/tests/amstream.c
+++ b/dlls/amstream/tests/amstream.c
@@ -414,7 +414,7 @@ static void test_mmstream_get_duration(const WCHAR *test_avi_path)
 
     duration = 0xdeadbeefdeadbeefULL;
     hr = IAMMultiMediaStream_GetDuration(mmstream, &duration);
-    todo_wine ok(hr == S_FALSE, "Got hr %#x.\n", hr);
+    ok(hr == S_FALSE, "Got hr %#x.\n", hr);
     ok(duration == 0, "Got duration %s.\n", wine_dbgstr_longlong(duration));
 
     ref = IAMMultiMediaStream_Release(mmstream);
@@ -427,7 +427,7 @@ static void test_mmstream_get_duration(const WCHAR *test_avi_path)
 
     duration = 0xdeadbeefdeadbeefULL;
     hr = IAMMultiMediaStream_GetDuration(mmstream, &duration);
-    todo_wine ok(hr == S_FALSE, "Got hr %#x.\n", hr);
+    ok(hr == S_FALSE, "Got hr %#x.\n", hr);
     ok(duration == 0, "Got duration %s.\n", wine_dbgstr_longlong(duration));
 
     ref = IAMMultiMediaStream_Release(mmstream);
@@ -442,7 +442,7 @@ static void test_mmstream_get_duration(const WCHAR *test_avi_path)
 
     duration = 0xdeadbeefdeadbeefULL;
     hr = IAMMultiMediaStream_GetDuration(mmstream, &duration);
-    todo_wine ok(hr == S_FALSE, "Got hr %#x.\n", hr);
+    ok(hr == S_FALSE, "Got hr %#x.\n", hr);
     ok(duration == 0, "Got duration %s.\n", wine_dbgstr_longlong(duration));
 
     ref = IAMMultiMediaStream_Release(mmstream);