--- a/src/DeviceHandler.cpp	2012-01-30 00:26:04.000000000 +0100
+++ a/src/DeviceHandler.cpp	2012-01-30 00:26:12.000000000 +0100
@@ -293,7 +293,7 @@ 
     USBDevice* lastDevice=NULL;
 
     //libusb_init was called by libfprint already
-//    libusb_init(NULL);
+    libusb_init(NULL);
     libusb_get_device_list(NULL,&devs);
     if(devs==NULL){
         syslog(LOG_ERR,"failed to get usb device list");