diff --git a/hwdriver.c b/hwdriver.c
index 4635f3c4..40995fe7 100644
--- a/hwdriver.c
+++ b/hwdriver.c
@@ -368,6 +368,19 @@ SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
 	return src;
 }
 
+SR_PRIV void sr_config_free(struct sr_config *src)
+{
+
+	if (!src || !src->data) {
+		sr_err("%s: invalid data!", __func__);
+		return;
+	}
+
+	g_variant_unref(src->data);
+	g_free(src);
+
+}
+
 /**
  * Returns information about the given driver or device instance.
  *
diff --git a/libsigrok-internal.h b/libsigrok-internal.h
index 649a0a31..b8b2adc0 100644
--- a/libsigrok-internal.h
+++ b/libsigrok-internal.h
@@ -114,6 +114,7 @@ SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial);
 
 SR_PRIV void sr_hw_cleanup_all(void);
 SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data);
+SR_PRIV void sr_config_free(struct sr_config *src);
 SR_PRIV int sr_source_remove(int fd);
 SR_PRIV int sr_source_add(int fd, int events, int timeout,
 			  sr_receive_data_callback_t cb, void *cb_data);