diff --git a/dlls/mmdevapi/tests/capture.c b/dlls/mmdevapi/tests/capture.c
index 5cf61ea8245..6c65128f2d2 100644
--- a/dlls/mmdevapi/tests/capture.c
+++ b/dlls/mmdevapi/tests/capture.c
@@ -491,7 +491,8 @@ static void test_audioclient(void)
     test_uninitialized(ac);
 
     hr = IAudioClient_Initialize(ac, 3, 0, 5000000, 0, pwfx, NULL);
-    ok(hr == AUDCLNT_E_NOT_INITIALIZED, "Initialize with invalid sharemode returns %08x\n", hr);
+    ok(broken(hr == AUDCLNT_E_NOT_INITIALIZED) || /* <= win8 */
+            hr == E_INVALIDARG, "Initialize with invalid sharemode returns %08x\n", hr);
 
     hr = IAudioClient_Initialize(ac, AUDCLNT_SHAREMODE_SHARED, 0xffffffff, 5000000, 0, pwfx, NULL);
     ok(hr == E_INVALIDARG || hr == AUDCLNT_E_INVALID_STREAM_FLAG, "Initialize with invalid flags returns %08x\n", hr);
diff --git a/dlls/mmdevapi/tests/render.c b/dlls/mmdevapi/tests/render.c
index 7de6d9adc92..50a43229a05 100644
--- a/dlls/mmdevapi/tests/render.c
+++ b/dlls/mmdevapi/tests/render.c
@@ -247,7 +247,8 @@ static void test_audioclient(void)
     test_uninitialized(ac);
 
     hr = IAudioClient_Initialize(ac, 3, 0, 5000000, 0, pwfx, NULL);
-    ok(hr == AUDCLNT_E_NOT_INITIALIZED, "Initialize with invalid sharemode returns %08x\n", hr);
+    ok(broken(hr == AUDCLNT_E_NOT_INITIALIZED) || /* <= win8 */
+            hr == E_INVALIDARG, "Initialize with invalid sharemode returns %08x\n", hr);
 
     hr = IAudioClient_Initialize(ac, AUDCLNT_SHAREMODE_SHARED, 0xffffffff, 5000000, 0, pwfx, NULL);
     ok(hr == E_INVALIDARG ||
diff --git a/dlls/winealsa.drv/mmdevdrv.c b/dlls/winealsa.drv/mmdevdrv.c
index 5bc71da77ae..c2fe59ea795 100644
--- a/dlls/winealsa.drv/mmdevdrv.c
+++ b/dlls/winealsa.drv/mmdevdrv.c
@@ -1255,7 +1255,7 @@ static HRESULT WINAPI AudioClient_Initialize(IAudioClient *iface,
         return E_POINTER;
 
     if(mode != AUDCLNT_SHAREMODE_SHARED && mode != AUDCLNT_SHAREMODE_EXCLUSIVE)
-        return AUDCLNT_E_NOT_INITIALIZED;
+        return E_INVALIDARG;
 
     if(flags & ~(AUDCLNT_STREAMFLAGS_CROSSPROCESS |
                 AUDCLNT_STREAMFLAGS_LOOPBACK |
diff --git a/dlls/wineandroid.drv/mmdevdrv.c b/dlls/wineandroid.drv/mmdevdrv.c
index e10b3debf1c..608e16a7a79 100644
--- a/dlls/wineandroid.drv/mmdevdrv.c
+++ b/dlls/wineandroid.drv/mmdevdrv.c
@@ -806,7 +806,7 @@ static HRESULT WINAPI AudioClient_Initialize(IAudioClient *iface,
     dump_fmt(fmt);
 
     if(mode != AUDCLNT_SHAREMODE_SHARED && mode != AUDCLNT_SHAREMODE_EXCLUSIVE)
-        return AUDCLNT_E_NOT_INITIALIZED;
+        return E_INVALIDARG;
 
     if(flags & ~(AUDCLNT_STREAMFLAGS_CROSSPROCESS |
                 AUDCLNT_STREAMFLAGS_LOOPBACK |
diff --git a/dlls/winecoreaudio.drv/mmdevdrv.c b/dlls/winecoreaudio.drv/mmdevdrv.c
index d595f43007b..acfa01c3d62 100644
--- a/dlls/winecoreaudio.drv/mmdevdrv.c
+++ b/dlls/winecoreaudio.drv/mmdevdrv.c
@@ -1314,7 +1314,7 @@ static HRESULT WINAPI AudioClient_Initialize(IAudioClient *iface,
     dump_fmt(fmt);
 
     if(mode != AUDCLNT_SHAREMODE_SHARED && mode != AUDCLNT_SHAREMODE_EXCLUSIVE)
-        return AUDCLNT_E_NOT_INITIALIZED;
+        return E_INVALIDARG;
 
     if(flags & ~(AUDCLNT_STREAMFLAGS_CROSSPROCESS |
                 AUDCLNT_STREAMFLAGS_LOOPBACK |
diff --git a/dlls/wineoss.drv/mmdevdrv.c b/dlls/wineoss.drv/mmdevdrv.c
index c6b6e8effe5..a08e7f561b5 100644
--- a/dlls/wineoss.drv/mmdevdrv.c
+++ b/dlls/wineoss.drv/mmdevdrv.c
@@ -1046,7 +1046,7 @@ static HRESULT WINAPI AudioClient_Initialize(IAudioClient *iface,
     dump_fmt(fmt);
 
     if(mode != AUDCLNT_SHAREMODE_SHARED && mode != AUDCLNT_SHAREMODE_EXCLUSIVE)
-        return AUDCLNT_E_NOT_INITIALIZED;
+        return E_INVALIDARG;
 
     if(flags & ~(AUDCLNT_STREAMFLAGS_CROSSPROCESS |
                 AUDCLNT_STREAMFLAGS_LOOPBACK |
diff --git a/dlls/winepulse.drv/mmdevdrv.c b/dlls/winepulse.drv/mmdevdrv.c
index 61f0e03c9f1..463d3d5a71a 100644
--- a/dlls/winepulse.drv/mmdevdrv.c
+++ b/dlls/winepulse.drv/mmdevdrv.c
@@ -1579,7 +1579,7 @@ static HRESULT WINAPI AudioClient_Initialize(IAudioClient *iface,
         return E_POINTER;
 
     if (mode != AUDCLNT_SHAREMODE_SHARED && mode != AUDCLNT_SHAREMODE_EXCLUSIVE)
-        return AUDCLNT_E_NOT_INITIALIZED;
+        return E_INVALIDARG;
     if (mode == AUDCLNT_SHAREMODE_EXCLUSIVE)
         return AUDCLNT_E_EXCLUSIVE_MODE_NOT_ALLOWED;