diff --git a/libmpcodecs/ae_lavc.c b/libmpcodecs/ae_lavc.c
index 3b07d6a963..4bc82abed4 100644
--- a/libmpcodecs/ae_lavc.c
+++ b/libmpcodecs/ae_lavc.c
@@ -248,6 +248,7 @@ int mpae_init_lavc(audio_encoder_t *encoder)
 	}
 
 	encoder->decode_buffer_size = lavc_actx->frame_size * 2 * encoder->params.channels;
+	while (encoder->decode_buffer_size < 1024) encoder->decode_buffer_size *= 2;
 	encoder->bind = bind_lavc;
 	encoder->get_frame_size = get_frame_size;
 	encoder->encode = encode_lavc;