diff --git a/loader/dmo/DMO_VideoDecoder.c b/loader/dmo/DMO_VideoDecoder.c
index 34cb54b7c8..937c1af61a 100644
--- a/loader/dmo/DMO_VideoDecoder.c
+++ b/loader/dmo/DMO_VideoDecoder.c
@@ -280,8 +280,8 @@ void DMO_VideoDecoder_StartInternal(DMO_VideoDecoder *this)
     props.cBuffers = 1;
     props.cbBuffer = this->m_sDestType.lSampleSize;
 
-    //don't know how to do this correctly
-    props.cbAlign = props.cbPrefix = 0;
+    props.cbAlign = 1;
+    props.cbPrefix = 0;
     this->m_pDMO_Filter->m_pAll->vt->SetProperties(this->m_pDMO_Filter->m_pAll, &props, &props1);
     this->m_pDMO_Filter->m_pAll->vt->Commit(this->m_pDMO_Filter->m_pAll);
 #endif    
diff --git a/loader/dshow/DS_AudioDecoder.c b/loader/dshow/DS_AudioDecoder.c
index d38dcdd52b..851854a9df 100644
--- a/loader/dshow/DS_AudioDecoder.c
+++ b/loader/dshow/DS_AudioDecoder.c
@@ -105,7 +105,8 @@ DS_AudioDecoder * DS_AudioDecoder_Open(char* dllname, GUID* guid, WAVEFORMATEX*
 
 	props.cBuffers=1;
         props.cbBuffer=this->m_sOurType.lSampleSize;
-	props.cbAlign=props.cbPrefix=0;
+	props.cbAlign=1;
+	props.cbPrefix=0;
 	this->m_pDS_Filter->m_pAll->vt->SetProperties(this->m_pDS_Filter->m_pAll, &props, &props1);
 	this->m_pDS_Filter->m_pAll->vt->Commit(this->m_pDS_Filter->m_pAll);
     }
diff --git a/loader/dshow/DS_VideoDecoder.c b/loader/dshow/DS_VideoDecoder.c
index ef3b77f33d..0ef20269a9 100644
--- a/loader/dshow/DS_VideoDecoder.c
+++ b/loader/dshow/DS_VideoDecoder.c
@@ -277,9 +277,8 @@ void DS_VideoDecoder_StartInternal(DS_VideoDecoder *this)
     
     props.cBuffers = 1;
     props.cbBuffer = this->m_sDestType.lSampleSize;
-
-    //don't know how to do this correctly
-    props.cbAlign = props.cbPrefix = 0;
+    props.cbAlign = 1;
+    props.cbPrefix = 0;
     this->m_pDS_Filter->m_pAll->vt->SetProperties(this->m_pDS_Filter->m_pAll, &props, &props1);
     this->m_pDS_Filter->m_pAll->vt->Commit(this->m_pDS_Filter->m_pAll);
     
diff --git a/loader/dshow/allocator.c b/loader/dshow/allocator.c
index 7f39c66a2e..34d453727e 100644
--- a/loader/dshow/allocator.c
+++ b/loader/dshow/allocator.c
@@ -306,7 +306,8 @@ MemAllocator* MemAllocatorCreate()
     This->refcount = 1;
     This->props.cBuffers = 1;
     This->props.cbBuffer = 65536; /* :/ */
-    This->props.cbAlign = This->props.cbPrefix = 0;
+    This->props.cbAlign = 1;
+    This->props.cbPrefix = 0;
 
     This->vt = (IMemAllocator_vt*) malloc(sizeof(IMemAllocator_vt));