diff --git a/libraries/AP_GPS/AP_GPS.cpp b/libraries/AP_GPS/AP_GPS.cpp
index 7857ca66a28ae1a8d707bb9baf1a3bb881fecaff..ffc8fb2f25465545d8de81b1046cfad1d7b6ba3f 100644
--- a/libraries/AP_GPS/AP_GPS.cpp
+++ b/libraries/AP_GPS/AP_GPS.cpp
@@ -27,7 +27,7 @@ const AP_Param::GroupInfo AP_GPS::var_info[] PROGMEM = {
     // @Param: TYPE
     // @DisplayName: GPS type
     // @Description: GPS type
-    // @Values: 0:None,1:AUTO,2:uBlox,3:MTK,4:MTK19,5:NMEA,6:SiRF,7:HIL,8:SwiftNav
+    // @Values: 0:None,1:AUTO,2:uBlox,3:MTK,4:MTK19,5:NMEA,6:SiRF,7:HIL,8:SwiftNav,9:PX4EXPERIMENTAL
     AP_GROUPINFO("TYPE",    0, AP_GPS, _type[0], 1),
 
 #if GPS_MAX_INSTANCES > 1
@@ -35,7 +35,7 @@ const AP_Param::GroupInfo AP_GPS::var_info[] PROGMEM = {
     // @Param: TYPE2
     // @DisplayName: 2nd GPS type
     // @Description: GPS type of 2nd GPS
-    // @Values: 0:None,1:AUTO,2:uBlox,3:MTK,4:MTK19,5:NMEA,6:SiRF,7:HIL,8:SwiftNav
+    // @Values: 0:None,1:AUTO,2:uBlox,3:MTK,4:MTK19,5:NMEA,6:SiRF,7:HIL,8:SwiftNav,9:PX4EXPERIMENTAL
     AP_GROUPINFO("TYPE2",   1, AP_GPS, _type[1], 0),
 
 #endif