diff --git a/dlls/dmsynth/synth.c b/dlls/dmsynth/synth.c
index 9850628148c..af8a6fd2266 100644
--- a/dlls/dmsynth/synth.c
+++ b/dlls/dmsynth/synth.c
@@ -511,7 +511,7 @@ static HRESULT WINAPI DMSynthImpl_IKsControl_KsProperty(IKsControl* iface, PKSPR
     }
 
     if (DataLength <  sizeof(DWORD))
-        return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
+        return E_NOT_SUFFICIENT_BUFFER;
 
     if (IsEqualGUID(&Property->u.s.Set, &GUID_DMUS_PROP_INSTRUMENT2))
     {
diff --git a/dlls/dmsynth/synthsink.c b/dlls/dmsynth/synthsink.c
index c5a1c7ebcf8..498c39067b8 100644
--- a/dlls/dmsynth/synthsink.c
+++ b/dlls/dmsynth/synthsink.c
@@ -223,7 +223,7 @@ static HRESULT WINAPI DMSynthSinkImpl_IKsControl_KsProperty(IKsControl* iface, P
     }
 
     if (DataLength <  sizeof(DWORD))
-        return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
+        return E_NOT_SUFFICIENT_BUFFER;
 
     if (IsEqualGUID(&Property->u.s.Set, &GUID_DMUS_PROP_SinkUsesDSound))
     {