diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e203c1..cce782f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -119,6 +119,7 @@ ENDIF(PCSC_INCLUDE_DIRS)
 IF(LIBUSB_INCLUDE_DIRS)
   INCLUDE_DIRECTORIES(${LIBUSB_INCLUDE_DIRS})
   LINK_DIRECTORIES(${LIBUSB_LIBRARY_DIRS})
+  SET(LIBUSB_FOUND TRUE)
 ENDIF(LIBUSB_INCLUDE_DIRS)
 
 # version.rc for Windows