diff --git a/src/descriptor.c b/src/descriptor.c
index fd6a1509..96d95623 100644
--- a/src/descriptor.c
+++ b/src/descriptor.c
@@ -381,7 +381,7 @@ static const dc_descriptor_t g_descriptors[] = {
 	{"Shearwater", "Predator", DC_FAMILY_SHEARWATER_PREDATOR, 2, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLUETOOTH, dc_filter_shearwater},
 	/* Shearwater Petrel */
 	{"Shearwater", "Petrel",    DC_FAMILY_SHEARWATER_PETREL, 3, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLUETOOTH, dc_filter_shearwater},
-	{"Shearwater", "Petrel 2",  DC_FAMILY_SHEARWATER_PETREL, 3, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLUETOOTH | DC_TRANSPORT_BLE, dc_filter_shearwater},
+	{"Shearwater", "Petrel 2",  DC_FAMILY_SHEARWATER_PETREL, 15, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLUETOOTH | DC_TRANSPORT_BLE, dc_filter_shearwater},
 	{"Shearwater", "Nerd",      DC_FAMILY_SHEARWATER_PETREL, 4, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLUETOOTH, dc_filter_shearwater},
 	{"Shearwater", "Perdix",    DC_FAMILY_SHEARWATER_PETREL, 5, DC_TRANSPORT_SERIAL | DC_TRANSPORT_BLUETOOTH | DC_TRANSPORT_BLE, dc_filter_shearwater},
 	{"Shearwater", "Perdix AI", DC_FAMILY_SHEARWATER_PETREL, 6, DC_TRANSPORT_BLE, dc_filter_shearwater},
diff --git a/src/shearwater_common.h b/src/shearwater_common.h
index 9808875b..678c46c4 100644
--- a/src/shearwater_common.h
+++ b/src/shearwater_common.h
@@ -46,7 +46,6 @@ extern "C" {
 
 #define PREDATOR 2
 #define PETREL   3
-#define PETREL2  PETREL
 #define NERD     4
 #define PERDIX   5
 #define PERDIXAI 6
@@ -58,6 +57,7 @@ extern "C" {
 #define TERN     12
 #define PEREGRINE_TX 13
 #define PERDIX3  14
+#define PETREL2  15
 
 #define NSTEPS    10000
 #define STEP(i,n) ((NSTEPS * (i) + (n) / 2) / (n))