diff --git a/sys/msdk/gstmsdkenc.c b/sys/msdk/gstmsdkenc.c
index b2e5a5a195..2219a50318 100644
--- a/sys/msdk/gstmsdkenc.c
+++ b/sys/msdk/gstmsdkenc.c
@@ -94,6 +94,7 @@ static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
 #define PROP_REF_FRAMES_DEFAULT          1
 #define PROP_I_FRAMES_DEFAULT            0
 #define PROP_B_FRAMES_DEFAULT            0
+#define PROP_NUM_SLICES_DEFAULT          0
 
 #define GST_MSDKENC_RATE_CONTROL_TYPE (gst_msdkenc_rate_control_get_type())
 static GType
@@ -293,6 +294,7 @@ gst_msdkenc_init_encoder (GstMsdkEnc * thiz)
   thiz->param.mfx.GopPicSize = thiz->gop_size;
   thiz->param.mfx.GopRefDist = thiz->b_frames + 1;
   thiz->param.mfx.IdrInterval = thiz->i_frames;
+  thiz->param.mfx.NumSlice = thiz->num_slices;
   thiz->param.mfx.NumRefFrame = thiz->ref_frames;
   thiz->param.mfx.EncodedOrder = 0;     /* Take input frames in display order */
 
@@ -1302,6 +1304,7 @@ gst_msdkenc_init (GstMsdkEnc * thiz)
   thiz->ref_frames = PROP_REF_FRAMES_DEFAULT;
   thiz->i_frames = PROP_I_FRAMES_DEFAULT;
   thiz->b_frames = PROP_B_FRAMES_DEFAULT;
+  thiz->num_slices = PROP_NUM_SLICES_DEFAULT;
 }
 
 /* gst_msdkenc_set_common_property:
diff --git a/sys/msdk/gstmsdkenc.h b/sys/msdk/gstmsdkenc.h
index 6813099be1..baccb7d5cc 100644
--- a/sys/msdk/gstmsdkenc.h
+++ b/sys/msdk/gstmsdkenc.h
@@ -134,6 +134,7 @@ struct _GstMsdkEnc
   guint ref_frames;
   guint i_frames;
   guint b_frames;
+  guint num_slices;
 
   gboolean reconfig;
 };