diff --git a/Tools/AP_Periph/AP_Periph.cpp b/Tools/AP_Periph/AP_Periph.cpp
index 965a59edaa..6298e5c635 100644
--- a/Tools/AP_Periph/AP_Periph.cpp
+++ b/Tools/AP_Periph/AP_Periph.cpp
@@ -223,7 +223,7 @@ void AP_Periph_FW::init()
     }
 #endif
 
-#ifdef HAL_PERIPH_ENABLE_PRX
+#if HAL_PROXIMITY_ENABLED
     if (proximity.get_type(0) != AP_Proximity::Type::None && g.proximity_port >= 0) {
         auto *uart = hal.serial(g.proximity_port);
         if (uart != nullptr) {
@@ -564,4 +564,4 @@ AP_Periph_FW& AP::periph()
     return *AP_Periph_FW::get_singleton();
 }
 
-AP_HAL_MAIN();
\ No newline at end of file
+AP_HAL_MAIN();
diff --git a/Tools/AP_Periph/AP_Periph.h b/Tools/AP_Periph/AP_Periph.h
index 76b78f4797..807459482f 100644
--- a/Tools/AP_Periph/AP_Periph.h
+++ b/Tools/AP_Periph/AP_Periph.h
@@ -209,7 +209,7 @@ public:
     uint32_t last_sample_ms;
 #endif
 
-#ifdef HAL_PERIPH_ENABLE_PRX
+#if HAL_PROXIMITY_ENABLED
     AP_Proximity proximity;
 #endif
 
diff --git a/Tools/AP_Periph/Parameters.cpp b/Tools/AP_Periph/Parameters.cpp
index 57156a3645..755be6c67c 100644
--- a/Tools/AP_Periph/Parameters.cpp
+++ b/Tools/AP_Periph/Parameters.cpp
@@ -475,7 +475,7 @@ const AP_Param::Info AP_Periph_FW::var_info[] = {
     GOBJECT(efi, "EFI", AP_EFI),
 #endif
 
-#ifdef HAL_PERIPH_ENABLE_PRX
+#if HAL_PROXIMITY_ENABLED
     // @Param: PRX_BAUDRATE
     // @DisplayName: Proximity Sensor serial baudrate
     // @Description: Proximity Sensor serial baudrate.
@@ -507,7 +507,7 @@ const AP_Param::Info AP_Periph_FW::var_info[] = {
     // @Group: PRX
     // @Path: ../libraries/AP_Proximity/AP_Proximity.cpp
     GOBJECT(proximity, "PRX", AP_Proximity),
-#endif
+#endif  // HAL_PROXIMITY_ENABLED
 
 #if HAL_NMEA_OUTPUT_ENABLED
     // @Group: NMEA_
diff --git a/Tools/AP_Periph/Parameters.h b/Tools/AP_Periph/Parameters.h
index c2ad8e678c..fb86ada1b8 100644
--- a/Tools/AP_Periph/Parameters.h
+++ b/Tools/AP_Periph/Parameters.h
@@ -109,7 +109,7 @@ public:
     AP_Int16 rangefinder_max_rate;
 #endif
 
-#ifdef HAL_PERIPH_ENABLE_PRX
+#if HAL_PROXIMITY_ENABLED
     AP_Int32 proximity_baud;
     AP_Int8 proximity_port;
     AP_Int16 proximity_max_rate;
@@ -191,4 +191,4 @@ public:
     Parameters() {}
 };
 
-extern const AP_Param::Info var_info[];
\ No newline at end of file
+extern const AP_Param::Info var_info[];
diff --git a/Tools/AP_Periph/can.cpp b/Tools/AP_Periph/can.cpp
index 43972a15d0..2c7fb6e8d3 100644
--- a/Tools/AP_Periph/can.cpp
+++ b/Tools/AP_Periph/can.cpp
@@ -2392,7 +2392,7 @@ void AP_Periph_FW::can_rangefinder_update(void)
 
 void AP_Periph_FW::can_proximity_update()
 {
-#ifdef HAL_PERIPH_ENABLE_PRX
+#if HAL_PROXIMITY_ENABLED
     if (proximity.get_type(0) == AP_Proximity::Type::None) {
         return;
     }
diff --git a/Tools/ardupilotwaf/boards.py b/Tools/ardupilotwaf/boards.py
index e107c325f3..69b4b9f02f 100644
--- a/Tools/ardupilotwaf/boards.py
+++ b/Tools/ardupilotwaf/boards.py
@@ -833,6 +833,7 @@ class sitl_periph_gps(sitl):
             AP_STATS_ENABLED = 0,
             HAL_SUPPORT_RCOUT_SERIAL = 0,
             AP_CAN_SLCAN_ENABLED = 0,
+            HAL_PROXIMITY_ENABLED = 0,
         )