diff --git a/sys/wasapi/gstwasapisink.c b/sys/wasapi/gstwasapisink.c
index e06f07a18b..fc5a32f303 100644
--- a/sys/wasapi/gstwasapisink.c
+++ b/sys/wasapi/gstwasapisink.c
@@ -208,7 +208,8 @@ gst_wasapi_sink_finalize (GObject * object)
 {
   GstWasapiSink *self = GST_WASAPI_SINK (object);
 
-  g_clear_pointer (&self->mix_format, CoTaskMemFree);
+  CoTaskMemFree (self->mix_format);
+  self->mix_format = NULL;
 
   if (self->cached_caps != NULL) {
     gst_caps_unref (self->cached_caps);
diff --git a/sys/wasapi/gstwasapisrc.c b/sys/wasapi/gstwasapisrc.c
index 1dbbc82398..bf52062cd3 100644
--- a/sys/wasapi/gstwasapisrc.c
+++ b/sys/wasapi/gstwasapisrc.c
@@ -218,7 +218,8 @@ gst_wasapi_src_finalize (GObject * object)
 {
   GstWasapiSrc *self = GST_WASAPI_SRC (object);
 
-  g_clear_pointer (&self->mix_format, CoTaskMemFree);
+  CoTaskMemFree (self->mix_format);
+  self->mix_format = NULL;
 
   g_clear_pointer (&self->cached_caps, gst_caps_unref);
   g_clear_pointer (&self->positions, g_free);