diff --git a/backend/pixma_mp810.c b/backend/pixma_mp810.c
index 22a7b3cc4..70af36db8 100644
--- a/backend/pixma_mp810.c
+++ b/backend/pixma_mp810.c
@@ -2311,7 +2311,7 @@ const pixma_config_t pixma_mp810_devices[] =
   DEVICE ("Canon Pixma MP970", "MP970", MP970_PID, 4800, 300, 0, 0, 0, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPU),
 
   /* Flatbed scanner CCD (2007) */
-  DEVICE ("Canoscan 8800F", "8800F", CS8800F_PID, 4800, 300, 0, 0, 0, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPU | PIXMA_CAP_NEGATIVE | PIXMA_CAP_48BIT),
+  DEVICE ("Canoscan 8800F", "8800F", CS8800F_PID, 4800, 300, 0, 0, 0, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPU /*| PIXMA_CAP_NEGATIVE*/ | PIXMA_CAP_48BIT),
 
   /* PIXMA 2008 vintage CCD */
   DEVICE ("Canon MP980 series", "MP980", MP980_PID, 4800, 300, 0, 0, 0, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPU),
@@ -2320,7 +2320,7 @@ const pixma_config_t pixma_mp810_devices[] =
   DEVICE ("Canon MP990 series", "MP990", MP990_PID, 4800, 300, 0, 0, 0, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPU),
 
   /* Flatbed scanner (2010) */
-  DEVICE ("Canoscan 9000F", "9000F", CS9000F_PID, 4800, 300, 9600, 600, 2400, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPUIR | PIXMA_CAP_NEGATIVE | PIXMA_CAP_48BIT),
+  DEVICE ("Canoscan 9000F", "9000F", CS9000F_PID, 4800, 300, 9600, 600, 2400, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPUIR /*| PIXMA_CAP_NEGATIVE*/ | PIXMA_CAP_48BIT),
 
   /* Latest devices (2010) Generation 4 CCD untested */
   DEVICE ("Canon PIXMA MG8100", "MG8100", MG8100_PID, 4800, 300, 0, 0, 0, 638, 877, PIXMA_CAP_CCD | PIXMA_CAP_TPU),