diff --git a/backend/ricoh2.c b/backend/ricoh2.c
index 616b71969..f884acc5d 100644
--- a/backend/ricoh2.c
+++ b/backend/ricoh2.c
@@ -106,6 +106,18 @@ typedef struct Ricoh2_Device {
 }
 Ricoh2_Device;
 
+typedef struct Ricoh2_device_info {
+  SANE_Int          product_id;
+  SANE_String_Const device_name;
+}
+Ricoh2_device_info;
+
+static Ricoh2_device_info supported_devices[] = {
+  { 0x0448, "Aficio SP111SU"   },
+  { 0x042c, "Aficio SP100SU"   },
+  { 0x0438, "Aficio SG3100SNw" }
+};
+
 static SANE_String_Const mode_list[] = {
   SANE_VALUE_SCAN_MODE_COLOR,
   SANE_VALUE_SCAN_MODE_GRAY,
@@ -137,14 +149,18 @@ lookup_handle(SANE_Handle handle)
   return NULL;
 }
 
-static const char* get_model_by_productid(SANE_Int id)
+static SANE_String_Const get_model_by_productid(SANE_Int id)
 {
-  switch (id)
+  size_t i = 0;
+  for (; i < sizeof (supported_devices) / sizeof (supported_devices[0]); ++i)
     {
-    case 0x0448: return "Aficio SP111SU";
-    case 0x042c: return "Aficio SP100SU";
-    default:     return "Unidentified device";
+      if (supported_devices[i].product_id == id)
+        {
+          return supported_devices[i].device_name;
+        }
     }
+
+  return "Unidentified device";
 }
 
 static SANE_Status
@@ -261,6 +277,8 @@ init_options(Ricoh2_Device *dev)
 SANE_Status
 sane_init (SANE_Int *vc, SANE_Auth_Callback __sane_unused__ cb)
 {
+  size_t i = 0;
+
   DBG_INIT ();
 
   DBG(2, "sane_init\n");
@@ -269,8 +287,11 @@ sane_init (SANE_Int *vc, SANE_Auth_Callback __sane_unused__ cb)
   sanei_usb_set_timeout (USB_TIMEOUT_MS);
 
   num_devices = 0;
-  sanei_usb_find_devices (0x5ca, 0x042c, attach);
-  sanei_usb_find_devices (0x5ca, 0x0448, attach);
+
+  for (; i < sizeof (supported_devices) / sizeof (supported_devices[0]); ++i)
+    {
+      sanei_usb_find_devices (0x5ca, supported_devices[i].product_id, attach);
+    }
 
   if (vc)
     *vc = SANE_VERSION_CODE (SANE_CURRENT_MAJOR, V_MINOR, 0);
diff --git a/doc/descriptions/ricoh2.desc b/doc/descriptions/ricoh2.desc
index 585d9e892..e4b07fe01 100644
--- a/doc/descriptions/ricoh2.desc
+++ b/doc/descriptions/ricoh2.desc
@@ -38,3 +38,8 @@
 :status :untested
 :interface "USB"
 :usbid "0x05ca" "0x042c"
+
+:model "SG-3100SNw"
+:status :basic
+:interface "USB"
+:usbid "0x05ca" "0x0438"
diff --git a/doc/sane-ricoh2.man b/doc/sane-ricoh2.man
index e32026674..ad1880387 100644
--- a/doc/sane-ricoh2.man
+++ b/doc/sane-ricoh2.man
@@ -13,6 +13,7 @@ SP-100SU
 .br
 SP-111SU
 .br
+SG-3100SNw
 .RE
 .PP
 .SH FILES
diff --git a/doc/sane.man b/doc/sane.man
index 1ba03cd0a..9140eb9a5 100644
--- a/doc/sane.man
+++ b/doc/sane.man
@@ -450,7 +450,7 @@ for details.
 .TP
 .B ricoh2
 The ricoh2 backend provides access to the following Ricoh flatbed
-scanners: SP-100SU and SP-111SU. See
+scanners: SP-100SU, SP-111SU, and SG-3100SNw. See
 .BR sane\-ricoh2 (5)
 for details.
 .TP