diff --git a/libavcodec/amrnbdec.c b/libavcodec/amrnbdec.c
index cd2d95b11b6fecff5bdb408e6eabdb69cda877ed..d3fa7653f8c863c448f57b203fd39f8a5bbbcdc6 100644
--- a/libavcodec/amrnbdec.c
+++ b/libavcodec/amrnbdec.c
@@ -1043,7 +1043,8 @@ static int amrnb_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     }
 
     ff_acelp_apply_order_2_transfer_function(buf_out, buf_out, highpass_zeros,
-                                             highpass_poles, highpass_gain,
+                                             highpass_poles,
+                                             highpass_gain * AMR_SAMPLE_SCALE,
                                              p->high_pass_mem, AMR_BLOCK_SIZE);
 
     /* Update averaged lsf vector (used for fixed gain smoothing).