diff --git a/dlls/winegstreamer/color_convert.c b/dlls/winegstreamer/color_convert.c
index 66a86aa4602..b47832b2c30 100644
--- a/dlls/winegstreamer/color_convert.c
+++ b/dlls/winegstreamer/color_convert.c
@@ -466,7 +466,6 @@ static HRESULT WINAPI transform_SetOutputType(IMFTransform *iface, DWORD id, IMF
 static HRESULT WINAPI transform_GetInputCurrentType(IMFTransform *iface, DWORD id, IMFMediaType **type)
 {
     struct color_convert *impl = impl_from_IMFTransform(iface);
-    IMFMediaType *ret;
     HRESULT hr;
 
     TRACE("iface %p, id %#lx, type %p.\n", iface, id, type);
@@ -477,16 +476,18 @@ static HRESULT WINAPI transform_GetInputCurrentType(IMFTransform *iface, DWORD i
     if (!impl->input_type)
         return MF_E_TRANSFORM_TYPE_NOT_SET;
 
-    if (FAILED(hr = MFCreateMediaType(&ret)))
+    if (FAILED(hr = MFCreateMediaType(type)))
         return hr;
 
-    return IMFMediaType_CopyAllItems(impl->input_type, (IMFAttributes *)ret);
+    if (FAILED(hr = IMFMediaType_CopyAllItems(impl->input_type, (IMFAttributes *)*type)))
+        IMFMediaType_Release(*type);
+
+    return hr;
 }
 
 static HRESULT WINAPI transform_GetOutputCurrentType(IMFTransform *iface, DWORD id, IMFMediaType **type)
 {
     struct color_convert *impl = impl_from_IMFTransform(iface);
-    IMFMediaType *ret;
     HRESULT hr;
 
     TRACE("iface %p, id %#lx, type %p.\n", iface, id, type);
@@ -497,10 +498,13 @@ static HRESULT WINAPI transform_GetOutputCurrentType(IMFTransform *iface, DWORD
     if (!impl->output_type)
         return MF_E_TRANSFORM_TYPE_NOT_SET;
 
-    if (FAILED(hr = MFCreateMediaType(&ret)))
+    if (FAILED(hr = MFCreateMediaType(type)))
         return hr;
 
-    return IMFMediaType_CopyAllItems(impl->output_type, (IMFAttributes *)ret);
+    if (FAILED(hr = IMFMediaType_CopyAllItems(impl->output_type, (IMFAttributes *)*type)))
+        IMFMediaType_Release(*type);
+
+    return hr;
 }
 
 static HRESULT WINAPI transform_GetInputStatus(IMFTransform *iface, DWORD id, DWORD *flags)