diff --git a/include/libsigrok/libsigrok.h b/include/libsigrok/libsigrok.h
index 353860d9..e0540a45 100644
--- a/include/libsigrok/libsigrok.h
+++ b/include/libsigrok/libsigrok.h
@@ -906,6 +906,9 @@ enum sr_configkey {
 	 */
 	SR_CONF_DATA_SOURCE,
 
+	/** The device supports setting a probe factor. */
+	SR_CONF_PROBE_FACTOR,
+
 	/*--- Acquisition modes, sample limiting ----------------------------*/
 
 	/**
diff --git a/src/hwdriver.c b/src/hwdriver.c
index 239592d3..17092206 100644
--- a/src/hwdriver.c
+++ b/src/hwdriver.c
@@ -183,6 +183,8 @@ static struct sr_config_info sr_config_info_data[] = {
 		"Power off", NULL},
 	{SR_CONF_DATA_SOURCE, SR_T_STRING, "data_source",
 		"Data source", NULL},
+	{SR_CONF_PROBE_FACTOR, SR_T_UINT64, "probe_factor",
+		"Probe factor", NULL},
 
 	/* Acquisition modes, sample limiting */
 	{SR_CONF_LIMIT_MSEC, SR_T_UINT64, "limit_time",