diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 87cf03d24b..a4dd70d61f 100644
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -1316,6 +1316,8 @@ static inline int vp3_dequant(Vp3DecodeContext *s, Vp3Fragment *frag,
             return i;
         }
     } while (i < 64);
+    // return value is expected to be a valid level
+    i--;
 end:
     // the actual DC+prediction is in the fragment structure
     block[0] = frag->dc * s->qmat[0][inter][plane][0];