diff --git a/dlls/quartz/acmwrapper.c b/dlls/quartz/acmwrapper.c
index 344779ccae7..b5a3f6ccf65 100644
--- a/dlls/quartz/acmwrapper.c
+++ b/dlls/quartz/acmwrapper.c
@@ -240,6 +240,7 @@ static const TransformFuncsTable ACMWrapper_FuncsTable = {
     NULL,
     ACMWrapper_ProcessSampleData,
     NULL,
+    NULL,
     ACMWrapper_ConnectInput,
     ACMWrapper_Cleanup
 };
diff --git a/dlls/quartz/avidec.c b/dlls/quartz/avidec.c
index a87850053ae..aa808008a9d 100644
--- a/dlls/quartz/avidec.c
+++ b/dlls/quartz/avidec.c
@@ -261,6 +261,7 @@ static const TransformFuncsTable AVIDec_FuncsTable = {
     AVIDec_ProcessBegin,
     AVIDec_ProcessSampleData,
     AVIDec_ProcessEnd,
+    NULL,
     AVIDec_ConnectInput,
     AVIDec_Cleanup
 };
diff --git a/dlls/quartz/transform.c b/dlls/quartz/transform.c
index 5a1b502c2df..2c2c0bf37bd 100644
--- a/dlls/quartz/transform.c
+++ b/dlls/quartz/transform.c
@@ -97,12 +97,14 @@ static HRESULT TransformFilter_Sample(LPVOID iface, IMediaSample * pSample)
 
 static HRESULT TransformFilter_Input_QueryAccept(LPVOID iface, const AM_MEDIA_TYPE * pmt)
 {
-    /* TransformFilterImpl* This = (TransformFilterImpl*)iface; */
+    TransformFilterImpl* This = (TransformFilterImpl*)iface;
     TRACE("%p\n", iface);
     dump_AM_MEDIA_TYPE(pmt);
 
-    /* FIXME: Add a function to verify media type with the actual filter */
-    /* return This->pFuncsTable->pfnConnectInput(This, pmt); */
+    if (This->pFuncsTable->pfnQueryConnect)
+        return This->pFuncsTable->pfnQueryConnect(This, pmt);
+    /* Assume OK if there's no query method (the connection will fail if
+       needed) */
     return S_OK;
 }
 
diff --git a/dlls/quartz/transform.h b/dlls/quartz/transform.h
index 65adad0c139..c967dd41b6e 100644
--- a/dlls/quartz/transform.h
+++ b/dlls/quartz/transform.h
@@ -24,6 +24,7 @@ typedef struct TransformFuncsTable {
     HRESULT (*pfnProcessBegin) (TransformFilterImpl* This);
     HRESULT (*pfnProcessSampleData) (TransformFilterImpl* This, LPBYTE data, DWORD size);
     HRESULT (*pfnProcessEnd) (TransformFilterImpl* This);
+    HRESULT (*pfnQueryConnect) (TransformFilterImpl* This, const AM_MEDIA_TYPE * pmt);
     HRESULT (*pfnConnectInput) (TransformFilterImpl* This, const AM_MEDIA_TYPE * pmt);
     HRESULT (*pfnCleanup) (TransformFilterImpl* This);
 } TransformFuncsTable;