diff --git a/include/libsigrok/libsigrok.h b/include/libsigrok/libsigrok.h
index de3136b9..22d9be45 100644
--- a/include/libsigrok/libsigrok.h
+++ b/include/libsigrok/libsigrok.h
@@ -982,12 +982,6 @@ enum sr_configkey {
 
 	/*--- Special stuff -------------------------------------------------*/
 
-	/** Scan options supported by the driver. */
-	SR_CONF_SCAN_OPTIONS = 40000,
-
-	/** Device options for a particular device. */
-	SR_CONF_DEVICE_OPTIONS,
-
 	/** Session filename. */
 	SR_CONF_SESSIONFILE,
 
diff --git a/src/hwdriver.c b/src/hwdriver.c
index 5a4b1b01..0aa7eb8c 100644
--- a/src/hwdriver.c
+++ b/src/hwdriver.c
@@ -173,10 +173,6 @@ static struct sr_key_info sr_key_info_config[] = {
 		"Over-temperature protection active", NULL},
 
 	/* Special stuff */
-	{SR_CONF_SCAN_OPTIONS, SR_T_STRING, "scan_options",
-		"Scan options", NULL},
-	{SR_CONF_DEVICE_OPTIONS, SR_T_STRING, "device_options",
-		"Device options", NULL},
 	{SR_CONF_SESSIONFILE, SR_T_STRING, "sessionfile",
 		"Session file", NULL},
 	{SR_CONF_CAPTUREFILE, SR_T_STRING, "capturefile",
diff --git a/src/libsigrok-internal.h b/src/libsigrok-internal.h
index 12b556ae..cc87e1ed 100644
--- a/src/libsigrok-internal.h
+++ b/src/libsigrok-internal.h
@@ -675,6 +675,12 @@ SR_PRIV int sr_log(int loglevel, const char *format, ...) G_GNUC_PRINTF(2, 3);
 
 /*--- device.c --------------------------------------------------------------*/
 
+/** Scan options supported by a driver. */
+#define SR_CONF_SCAN_OPTIONS 0x7FFF0000
+
+/** Device options for a particular device. */
+#define SR_CONF_DEVICE_OPTIONS 0x7FFF0001
+
 /** Values for the changes argument of sr_dev_driver.config_channel_set. */
 enum {
 	/** The enabled state of the channel has been changed. */