diff --git a/Cargo.toml b/Cargo.toml
index 8a18526..c17eea1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,6 +15,7 @@ links = "usb-1.0"
 
 [dependencies]
 libc = "0.2"
+libusb-sys = "0.2"
 
 [build-dependencies]
 pkg-config = "0.3.2"