diff --git a/src/dmm/vc870.c b/src/dmm/vc870.c
index fc795678..2663260b 100644
--- a/src/dmm/vc870.c
+++ b/src/dmm/vc870.c
@@ -280,7 +280,6 @@ static void parse_flags(const uint8_t *buf, struct vc870_info *info)
 	/* Byte 22: Always '\n' (newline, 0x0a, 10) */
 
 	info->is_auto = !info->is_manu;
-	info->is_rms = TRUE;
 }
 
 static void handle_flags(struct sr_datafeed_analog_old *analog,
diff --git a/src/libsigrok-internal.h b/src/libsigrok-internal.h
index 09a4f5c5..3c18ffaf 100644
--- a/src/libsigrok-internal.h
+++ b/src/libsigrok-internal.h
@@ -1202,7 +1202,7 @@ struct vc870_info {
 	gboolean is_light, is_usb, is_warning, is_auto_power, is_misplug_warn;
 	gboolean is_lo, is_hi, is_open2;
 
-	gboolean is_frequency, is_dual_display, is_auto, is_rms;
+	gboolean is_frequency, is_dual_display, is_auto;
 };
 
 SR_PRIV gboolean sr_vc870_packet_valid(const uint8_t *buf);