diff --git a/libavcodec/vmnc.c b/libavcodec/vmnc.c
index 9ac8d935ae..c1b6d4e85d 100644
--- a/libavcodec/vmnc.c
+++ b/libavcodec/vmnc.c
@@ -307,6 +307,8 @@ static void reset_buffers(VmncContext *c)
     av_freep(&c->curmask);
     av_freep(&c->screendta);
     c->cur_w = c->cur_h = 0;
+    c->cur_hx = c->cur_hy = 0;
+
 }
 
 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,