diff --git a/dlls/strmbase/pin.c b/dlls/strmbase/pin.c
index d99a0bb460a..eb9b23c2c8e 100644
--- a/dlls/strmbase/pin.c
+++ b/dlls/strmbase/pin.c
@@ -981,7 +981,7 @@ HRESULT WINAPI BaseInputPinImpl_EndOfStream(IPin * iface)
     if (This->flushing)
         hr = S_FALSE;
     else
-        This->end_of_stream = 1;
+        This->end_of_stream = TRUE;
     LeaveCriticalSection(This->pin.pCritSec);
 
     if (hr == S_OK)
@@ -1001,7 +1001,7 @@ HRESULT WINAPI BaseInputPinImpl_BeginFlush(IPin * iface)
     TRACE("() semi-stub\n");
 
     EnterCriticalSection(This->pin.pCritSec);
-    This->flushing = 1;
+    This->flushing = TRUE;
 
     hr = SendFurther( iface, deliver_beginflush, NULL, NULL );
     LeaveCriticalSection(This->pin.pCritSec);
@@ -1021,7 +1021,7 @@ HRESULT WINAPI BaseInputPinImpl_EndFlush(IPin * iface)
     TRACE("(%p)\n", This);
 
     EnterCriticalSection(This->pin.pCritSec);
-    This->flushing = This->end_of_stream = 0;
+    This->flushing = This->end_of_stream = FALSE;
 
     hr = SendFurther( iface, deliver_endflush, NULL, NULL );
     LeaveCriticalSection(This->pin.pCritSec);
@@ -1232,7 +1232,7 @@ static HRESULT InputPin_Init(const IPinVtbl *InputPin_Vtbl, const PIN_INFO * pPi
         IMemAllocator_AddRef(pPinImpl->preferred_allocator);
     pPinImpl->pin.IPin_iface.lpVtbl = InputPin_Vtbl;
     pPinImpl->IMemInputPin_iface.lpVtbl = &MemInputPin_Vtbl;
-    pPinImpl->flushing = pPinImpl->end_of_stream = 0;
+    pPinImpl->flushing = pPinImpl->end_of_stream = FALSE;
 
     return S_OK;
 }
diff --git a/dlls/strmbase/pospass.c b/dlls/strmbase/pospass.c
index 71c1dc67d17..b7ba8117a68 100644
--- a/dlls/strmbase/pospass.c
+++ b/dlls/strmbase/pospass.c
@@ -263,7 +263,7 @@ HRESULT WINAPI PosPassThru_Construct(IUnknown *pUnkOuter, LPVOID *ppPassThru)
     fimpl->IMediaPosition_iface.lpVtbl = &IMediaPositionPassThru_Vtbl;
     fimpl->ref = 1;
     fimpl->pin = NULL;
-    fimpl->timevalid = 0;
+    fimpl->timevalid = FALSE;
     InitializeCriticalSection(&fimpl->time_cs);
     fimpl->time_cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PassThruImpl.time_cs");
     BaseDispatch_Init(&fimpl->baseDispatch, &IID_IMediaPosition);
@@ -599,7 +599,7 @@ HRESULT WINAPI RendererPosPassThru_RegisterMediaTime(IUnknown *iface, REFERENCE_
     PassThruImpl *This = impl_from_IUnknown_inner(iface);
     EnterCriticalSection(&This->time_cs);
     This->time_earliest = start;
-    This->timevalid = 1;
+    This->timevalid = TRUE;
     LeaveCriticalSection(&This->time_cs);
     return S_OK;
 }
@@ -608,7 +608,7 @@ HRESULT WINAPI RendererPosPassThru_ResetMediaTime(IUnknown *iface)
 {
     PassThruImpl *This = impl_from_IUnknown_inner(iface);
     EnterCriticalSection(&This->time_cs);
-    This->timevalid = 0;
+    This->timevalid = FALSE;
     LeaveCriticalSection(&This->time_cs);
     return S_OK;
 }
@@ -621,10 +621,10 @@ HRESULT WINAPI RendererPosPassThru_EOS(IUnknown *iface)
     hr = IMediaSeeking_GetStopPosition(&This->IMediaSeeking_iface, &time);
     EnterCriticalSection(&This->time_cs);
     if (SUCCEEDED(hr)) {
-        This->timevalid = 1;
+        This->timevalid = TRUE;
         This->time_earliest = time;
     } else
-        This->timevalid = 0;
+        This->timevalid = FALSE;
     LeaveCriticalSection(&This->time_cs);
     return hr;
 }
diff --git a/dlls/strmbase/qualitycontrol.c b/dlls/strmbase/qualitycontrol.c
index f96ed64a2a2..9bdc25104e6 100644
--- a/dlls/strmbase/qualitycontrol.c
+++ b/dlls/strmbase/qualitycontrol.c
@@ -112,8 +112,9 @@ void QualityControlRender_Start(QualityControlImpl *This, REFERENCE_TIME tStart)
     This->avg_render = This->last_in_time = This->last_left = This->avg_duration = This->avg_pt = -1;
     This->clockstart = tStart;
     This->avg_rate = -1.0;
-    This->rendered = This->dropped = This->is_dropped = 0;
-    This->qos_handled = 1; /* Lie that will be corrected on first adjustment */
+    This->rendered = This->dropped = 0;
+    This->is_dropped = FALSE;
+    This->qos_handled = TRUE; /* Lie that will be corrected on first adjustment */
 }
 
 
diff --git a/dlls/strmbase/renderer.c b/dlls/strmbase/renderer.c
index 56f72f1a7ef..6334284dd9e 100644
--- a/dlls/strmbase/renderer.c
+++ b/dlls/strmbase/renderer.c
@@ -472,7 +472,7 @@ HRESULT WINAPI BaseRendererImpl_Run(IBaseFilter * iface, REFERENCE_TIME tStart)
 
     if (This->pInputPin->pin.pConnectedTo)
     {
-        This->pInputPin->end_of_stream = 0;
+        This->pInputPin->end_of_stream = FALSE;
     }
     else if (This->filter.filterInfo.pGraph)
     {
@@ -515,7 +515,7 @@ HRESULT WINAPI BaseRendererImpl_Pause(IBaseFilter * iface)
             {
                 if (This->pInputPin->pin.pConnectedTo)
                     ResetEvent(This->evComplete);
-                This->pInputPin->end_of_stream = 0;
+                This->pInputPin->end_of_stream = FALSE;
             }
             else if (This->pFuncsTable->pfnOnStopStreaming)
                 This->pFuncsTable->pfnOnStopStreaming(This);
diff --git a/dlls/strmbase/transform.c b/dlls/strmbase/transform.c
index 2290bedd0a5..8cf9ee8414b 100644
--- a/dlls/strmbase/transform.c
+++ b/dlls/strmbase/transform.c
@@ -406,7 +406,7 @@ HRESULT WINAPI TransformFilterImpl_Run(IBaseFilter * iface, REFERENCE_TIME tStar
     {
         if (This->filter.state == State_Stopped)
         {
-            impl_BaseInputPin_from_IPin(This->ppPins[0])->end_of_stream = 0;
+            impl_BaseInputPin_from_IPin(This->ppPins[0])->end_of_stream = FALSE;
             if (This->pFuncsTable->pfnStartStreaming)
                 hr = This->pFuncsTable->pfnStartStreaming(This);
             if (SUCCEEDED(hr))