diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
index 93d49ba21d..1bc5600061 100644
--- a/libavcodec/qsvenc.c
+++ b/libavcodec/qsvenc.c
@@ -824,7 +824,9 @@ static int qsv_retrieve_enc_vp9_params(AVCodecContext *avctx, QSVEncContext *q)
 #endif
 
     mfxExtBuffer *ext_buffers[] = {
+#if QSV_HAVE_EXT_VP9_PARAM
         (mfxExtBuffer*)&vp9_extend_buf,
+#endif
 #if QSV_HAVE_CO2
         (mfxExtBuffer*)&co2,
 #endif