--- src/scangearmp2-source-4.30-1/scangearmp2/src/canon_mfp_tools.c	2022-03-06 11:32:22.511185016 +0100
+++ patched-src/scangearmp2-source-4.30-1/scangearmp2/src/canon_mfp_tools.c	2022-03-06 11:31:53.910909156 +0100
@@ -394,7 +394,7 @@
 		goto onErr;
 	}
 	/* search canon mfp */
-	numdev = libusb_get_device_list(NULL, &g_devlist);
+	numdev = libusb_get_device_list(g_context, &g_devlist);
 	if((int)numdev == 0) {
 		err = CN_USB_WRITE_ERROR;
 		goto onErr;