diff --git a/src/oceanic_atom2.c b/src/oceanic_atom2.c
index 1178d7d..db1fa8f 100644
--- a/src/oceanic_atom2.c
+++ b/src/oceanic_atom2.c
@@ -66,7 +66,7 @@ static const device_backend_t oceanic_atom2_device_backend = {
 static const unsigned char oceanic_atom2_version[] = "2M ATOM r\0\0 512K";
 static const unsigned char oceanic_oc1_version[]   = "OCWATCH R\0\0 1024";
 
-static const oceanic_common_layout_t oceanic_atom2_layout = {
+static const oceanic_common_layout_t oceanic_default_layout = {
 	0x10000, /* memsize */
 	0x0000, /* cf_devinfo */
 	0x0040, /* cf_pointers */
@@ -78,6 +78,18 @@ static const oceanic_common_layout_t oceanic_atom2_layout = {
 	0 /* pt_mode_logbook */
 };
 
+static const oceanic_common_layout_t oceanic_atom2_layout = {
+	0xFFF0, /* memsize */
+	0x0000, /* cf_devinfo */
+	0x0040, /* cf_pointers */
+	0x0240, /* rb_logbook_begin */
+	0x0A40, /* rb_logbook_end */
+	0x0A40, /* rb_profile_begin */
+	0xFFF0, /* rb_profile_end */
+	0, /* pt_mode_global */
+	0 /* pt_mode_logbook */
+};
+
 static const oceanic_common_layout_t oceanic_oc1_layout = {
 	0x20000, /* memsize */
 	0x0000, /* cf_devinfo */
@@ -308,8 +320,10 @@ oceanic_atom2_device_open (device_t **out, const char* name)
 	// Override the base class values.
 	if (oceanic_common_match (oceanic_oc1_version, device->version, sizeof (device->version)))
 		device->base.layout = &oceanic_oc1_layout;
-	else
+	else if (oceanic_common_match (oceanic_atom2_version, device->version, sizeof (device->version)))
 		device->base.layout = &oceanic_atom2_layout;
+	else
+		device->base.layout = &oceanic_default_layout;
 
 	*out = (device_t*) device;