diff --git a/backend/genesys_devices.c b/backend/genesys_devices.c
index 73d70bb35..55c7fbfc2 100644
--- a/backend/genesys_devices.c
+++ b/backend/genesys_devices.c
@@ -475,7 +475,7 @@ static Genesys_Sensor Sensor[] = {
    73*8,	/* black pixels 73 at 600 dpi */
    16*8,	/* dummy pixels */
    384*8,	/* CCD_startx_offset 384 at 600 dpi */
-   5186*8,	/* 8x5570 segments */
+   5188*8,	/* 8x5570 segments , 5187+1 for rounding */
    210,
    200,
    {0x00, 0x00, 0x00, 0x00},
diff --git a/backend/genesys_gl847.c b/backend/genesys_gl847.c
index 96070a4d3..420c4e40d 100644
--- a/backend/genesys_gl847.c
+++ b/backend/genesys_gl847.c
@@ -1215,7 +1215,8 @@ gl847_init_optical_regs_scan (Genesys_Device * dev,
         }
       dev->dist = sensor->segcnt;
     }
-  endx += dev->dist*(segnb-1);
+  /* use a segcnt rounded to next even number */
+  endx += ((dev->dist+1)&0xfffe)*(segnb-1);
   used_pixels=endx-startx;
 
   status = gl847_set_fe (dev, AFE_SET);
diff --git a/backend/genesys_gl847.h b/backend/genesys_gl847.h
index 89a5e6829..9816cdc6c 100644
--- a/backend/genesys_gl847.h
+++ b/backend/genesys_gl847.h
@@ -612,6 +612,8 @@ static size_t order_01[]={0,1};
 static size_t order_0213[]={0,2,1,3};
 static size_t order_0246[]={0,2,4,6,1,3,5,7};
 
+static size_t new_order[]={0,1,2,3};
+
 /**
  * database of sensor profiles
  */
@@ -624,18 +626,18 @@ static Sensor_Profile sensors[]={
 	{CIS_CANONLIDE200,  150,  2848, 240, 636, 340, 5144, 0, 255,  637,  637,  637},
 	{CIS_CANONLIDE200,  300,  1424, 240, 636, 340, 5144, 0, 255,  637,  637,  637},
 	*/
-	{CIS_CANONLIDE200,  200,  2848, 60, 159, 85, 5136, 255,  410,  275,  203, NULL      , 0x0a},
-	{CIS_CANONLIDE200,  600,  1432, 60, 159, 85, 5136, 255,  410,  275,  203, NULL      , 0x0a},
-	{CIS_CANONLIDE200, 1200,  2712, 60, 159, 85, 5136, 255,  746,  478,  353, order_01  , 0x08},
-	{CIS_CANONLIDE200, 2400,  5280, 60, 159, 85, 5136, 255, 1417,  909,  643, order_0213, 0x06},
-	{CIS_CANONLIDE200, 4800, 10416, 60, 159, 85, 5136, 255, 2692, 1728, 1221, order_0246, 0x04},
+	{CIS_CANONLIDE200,  200,  2848,  60, 159, 85, 5136, 255,  410,  275,  203, NULL      , 0x0a},
+	{CIS_CANONLIDE200,  600,  1432,  60, 159, 85, 5136, 255,  410,  275,  203, NULL      , 0x0a},
+	{CIS_CANONLIDE200, 1200,  2712,  60, 159, 85, 5136, 255,  746,  478,  353, order_01  , 0x08},
+	{CIS_CANONLIDE200, 2400,  5280,  60, 159, 85, 5136, 255, 1417,  909,  643, order_0213, 0x06},
+	{CIS_CANONLIDE200, 4800, 10416,  60, 159, 85, 5136, 255, 2692, 1728, 1221, order_0246, 0x04},
 
         /* LiDE 700F */
-	{CIS_CANONLIDE700,  150,  2848, 135, 249, 85, 5186, 255,  465,  310,  239, 0x0c},
-	{CIS_CANONLIDE700,  300,  1424, 135, 249, 85, 5186, 255,  465,  310,  239, 0x0c},
-	{CIS_CANONLIDE700,  600,  1504, 135, 249, 85, 5186, 255,  465,  310,  239, 0x0c},
-	{CIS_CANONLIDE700, 1200,  2696, 135, 249, 85, 5186, 255, 1464,  844,  555, 0x0a}, /* 2696 */
-	{CIS_CANONLIDE700, 2400, 10576, 135, 249, 85, 5186, 255, 2798, 1558,  972, 0x08},
+	{CIS_CANONLIDE700,  150,  2848, 135, 249, 85, 5187, 255,  465,  310,  239, NULL      , 0x0c},
+	{CIS_CANONLIDE700,  300,  1424, 135, 249, 85, 5187, 255,  465,  310,  239, NULL      , 0x0c},
+	{CIS_CANONLIDE700,  600,  1504, 135, 249, 85, 5187, 255,  465,  310,  239, NULL      , 0x0c},
+	{CIS_CANONLIDE700, 1200,  2696, 135, 249, 85, 5187, 255, 1464,  844,  555, order_01  , 0x0a},
+	{CIS_CANONLIDE700, 2400, 10576, 135, 249, 85, 5187, 255, 2798, 1558,  972, new_order , 0x08},
 };
 /* *INDENT-ON* */