diff --git a/ArduPlane/ArduPlane.pde b/ArduPlane/ArduPlane.pde
index 4ea549dbfa..3a9a158946 100644
--- a/ArduPlane/ArduPlane.pde
+++ b/ArduPlane/ArduPlane.pde
@@ -51,7 +51,6 @@
 #include <AP_Relay.h>       // APM relay
 #include <AP_Camera.h>          // Photo or video camera
 #include <AP_Airspeed.h>
-#include <memcheck.h>
 
 #include <APM_OBC.h>
 #include <APM_Control.h>
@@ -763,10 +762,6 @@ static const AP_Scheduler::Task scheduler_tasks[] PROGMEM = {
 AP_Param param_loader(var_info, WP_START_BYTE);
 
 void setup() {
-    // this needs to be the first call, as it fills memory with
-    // sentinel values
-    memcheck_init();
-
     cliSerial = hal.console;
 
     // load the default values of variables listed in var_info[]
diff --git a/ArduPlane/GCS_Mavlink.pde b/ArduPlane/GCS_Mavlink.pde
index e41c437fef..b4a28ffd9b 100644
--- a/ArduPlane/GCS_Mavlink.pde
+++ b/ArduPlane/GCS_Mavlink.pde
@@ -246,7 +246,7 @@ static void NOINLINE send_meminfo(mavlink_channel_t chan)
 {
 #if CONFIG_HAL_BOARD == HAL_BOARD_APM1 || CONFIG_HAL_BOARD == HAL_BOARD_APM2
     extern unsigned __brkval;
-    mavlink_msg_meminfo_send(chan, __brkval, memcheck_available_memory());
+    mavlink_msg_meminfo_send(chan, __brkval, hal.util->available_memory());
 #endif
 }
 
diff --git a/ArduPlane/Log.pde b/ArduPlane/Log.pde
index 9635cbef65..def5eb79a3 100644
--- a/ArduPlane/Log.pde
+++ b/ArduPlane/Log.pde
@@ -555,7 +555,7 @@ static void Log_Read(uint16_t log_num, int16_t start_page, int16_t end_page)
 {
     cliSerial->printf_P(PSTR("\n" FIRMWARE_STRING
                              "\nFree RAM: %u\n"),
-                        (unsigned) memcheck_available_memory());
+                        (unsigned)hal.util->available_memory());
 
     cliSerial->println_P(PSTR(HAL_BOARD_NAME));
 
diff --git a/ArduPlane/geofence.pde b/ArduPlane/geofence.pde
index 5cd4b247c5..fcceb54b55 100644
--- a/ArduPlane/geofence.pde
+++ b/ArduPlane/geofence.pde
@@ -78,7 +78,7 @@ static void geofence_load(void)
     uint8_t i;
 
     if (geofence_state == NULL) {
-        if (memcheck_available_memory() < 512 + sizeof(struct GeofenceState)) {
+        if (hal.util->available_memory() < 512 + sizeof(struct GeofenceState)) {
             // too risky to enable as we could run out of stack
             goto failed;
         }
diff --git a/ArduPlane/system.pde b/ArduPlane/system.pde
index 0a6c1ec7b5..8d597b46c7 100644
--- a/ArduPlane/system.pde
+++ b/ArduPlane/system.pde
@@ -84,7 +84,7 @@ static void init_ardupilot()
 
     cliSerial->printf_P(PSTR("\n\nInit " FIRMWARE_STRING
                          "\n\nFree RAM: %u\n"),
-                    memcheck_available_memory());
+                        hal.util->available_memory());
 
 
     //