diff --git a/src/librtlsdr.c b/src/librtlsdr.c
index 89ec903..d72a0f5 100644
--- a/src/librtlsdr.c
+++ b/src/librtlsdr.c
@@ -1628,6 +1628,9 @@ found:
 	return 0;
 err:
 	if (dev) {
+		if (dev->devh)
+			libusb_close(dev->devh);
+
 		if (dev->ctx)
 			libusb_exit(dev->ctx);