diff --git a/dlls/quartz/acmwrapper.c b/dlls/quartz/acmwrapper.c
index 12d96f69376..cf8e7cd125d 100644
--- a/dlls/quartz/acmwrapper.c
+++ b/dlls/quartz/acmwrapper.c
@@ -140,8 +140,7 @@ static HRESULT WINAPI acm_wrapper_sink_Receive(struct strmbase_sink *iface, IMed
 
     while(hr == S_OK && ash.cbSrcLength)
     {
-        hr = BaseOutputPinImpl_GetDeliveryBuffer(&This->source, &pOutSample, NULL, NULL, 0);
-        if (FAILED(hr))
+        if (FAILED(hr = IMemAllocator_GetBuffer(This->source.pAllocator, &pOutSample, NULL, NULL, 0)))
         {
             ERR("Failed to get sample, hr %#lx.\n", hr);
             return hr;
diff --git a/dlls/quartz/avidec.c b/dlls/quartz/avidec.c
index 30b6c741eed..f8660890273 100644
--- a/dlls/quartz/avidec.c
+++ b/dlls/quartz/avidec.c
@@ -139,8 +139,8 @@ static HRESULT WINAPI avi_decompressor_sink_Receive(struct strmbase_sink *iface,
     /* Update input size to match sample size */
     This->pBihIn->biSizeImage = cbSrcStream;
 
-    hr = BaseOutputPinImpl_GetDeliveryBuffer(&This->source, &pOutSample, NULL, NULL, 0);
-    if (FAILED(hr)) {
+    if (FAILED(hr = IMemAllocator_GetBuffer(This->source.pAllocator, &pOutSample, NULL, NULL, 0)))
+    {
         ERR("Failed to get sample, hr %#lx.\n", hr);
         return hr;
     }