diff --git a/libusb/core.c b/libusb/core.c
index 7893ac2..1c1ada1 100644
--- a/libusb/core.c
+++ b/libusb/core.c
@@ -2441,6 +2441,7 @@
 	for_each_device(_ctx, dev) {
 		usbi_warn(_ctx, "device %d.%d still referenced",
 			dev->bus_number, dev->device_address);
+		DEVICE_CTX(dev) = NULL;
 	}
 
 	if (!list_empty(&_ctx->open_devs))
diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 03df9b4..2b170fc 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11692
+#define LIBUSB_NANO 11693