diff --git a/ArduSub/Parameters.h b/ArduSub/Parameters.h
index 5795c50168..6854c93328 100644
--- a/ArduSub/Parameters.h
+++ b/ArduSub/Parameters.h
@@ -382,9 +382,11 @@ static const struct AP_Param::defaults_table_struct defaults_table[] = {
     { "RC3_TRIM",            1100},
     { "COMPASS_OFFS_MAX",    1000},
     { "INS_GYR_CAL",         0},
+#if HAL_MOUNT_ENABLED
     { "MNT1_TYPE",           1},
     { "MNT1_DEFLT_MODE",     MAV_MOUNT_MODE_RC_TARGETING},
     { "MNT1_RC_RATE",        30},
+#endif
     { "RC7_OPTION",          214},   // MOUNT1_YAW
     { "RC8_OPTION",          213},   // MOUNT1_PITCH
     { "MOT_PWM_MIN",         1100},
@@ -395,7 +397,9 @@ static const struct AP_Param::defaults_table_struct defaults_table[] = {
     { "PSC_VELXY_P",         6.0f},
     { "EK3_SRC1_VELZ",       0},
 #if CONFIG_HAL_BOARD_SUBTYPE == HAL_BOARD_SUBTYPE_LINUX_NAVIGATOR
+#if AP_BARO_PROBE_EXT_PARAMETER_ENABLED
     { "BARO_PROBE_EXT",      0},
+#endif
     { "BATT_MONITOR",        4},
     { "BATT_CAPACITY",       0},
     { "LEAK1_PIN",           27},
@@ -405,7 +409,9 @@ static const struct AP_Param::defaults_table_struct defaults_table[] = {
     { "SERVO16_FUNCTION",    7},     // k_mount_tilt
     { "SERVO16_REVERSED",    1},
 #else
+#if AP_BARO_PROBE_EXT_PARAMETER_ENABLED
     { "BARO_PROBE_EXT",      768},
+#endif
     { "SERVO9_FUNCTION",     59},    // k_rcin9, lights 1
     { "SERVO10_FUNCTION",    7},     // k_mount_tilt
 #endif