diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index c6735a49c9..846ec5ef9c 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -163,9 +163,9 @@ static av_cold int adpcm_decode_init(AVCodecContext * avctx)
         break;
     case AV_CODEC_ID_ADPCM_IMA_APM:
         if (avctx->extradata && avctx->extradata_size >= 16) {
-            c->status[0].predictor  = AV_RL32(avctx->extradata +  0);
+            c->status[0].predictor  = av_clip_intp2(AV_RL32(avctx->extradata +  0), 18);
             c->status[0].step_index = av_clip(AV_RL32(avctx->extradata +  4), 0, 88);
-            c->status[1].predictor  = AV_RL32(avctx->extradata +  8);
+            c->status[1].predictor  = av_clip_intp2(AV_RL32(avctx->extradata +  8), 18);
             c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 12), 0, 88);
         }
         break;