diff --git a/src/hardware/cem-dt-885x/protocol.c b/src/hardware/cem-dt-885x/protocol.c
index 65642775..77b2f6ad 100644
--- a/src/hardware/cem-dt-885x/protocol.c
+++ b/src/hardware/cem-dt-885x/protocol.c
@@ -134,7 +134,7 @@ static void process_mset(const struct sr_dev_inst *sdi)
 				break;
 			}
 		}
-		sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
+		sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
 		analog.meaning->mq = SR_MQ_SOUND_PRESSURE_LEVEL;
 		analog.meaning->mqflags = devc->cur_mqflags;
 		analog.meaning->unit = SR_UNIT_DECIBEL_SPL;
@@ -195,7 +195,7 @@ static void send_data(const struct sr_dev_inst *sdi, unsigned char *data,
 		fbuf[i] += ((data[i * 2 + 1] & 0xf0) >> 4);
 		fbuf[i] += (data[i * 2 + 1] & 0x0f) / 10.0;
 	}
-	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
+	sr_analog_init(&analog, &encoding, &meaning, &spec, 1);
 	analog.meaning->mq = SR_MQ_SOUND_PRESSURE_LEVEL;
 	analog.meaning->mqflags = devc->cur_mqflags;
 	analog.meaning->unit = SR_UNIT_DECIBEL_SPL;