diff --git a/libraries/AP_ExternalAHRS/AP_ExternalAHRS.cpp b/libraries/AP_ExternalAHRS/AP_ExternalAHRS.cpp
index 7900bab825..e113eba81d 100644
--- a/libraries/AP_ExternalAHRS/AP_ExternalAHRS.cpp
+++ b/libraries/AP_ExternalAHRS/AP_ExternalAHRS.cpp
@@ -108,25 +108,25 @@ void AP_ExternalAHRS::init(void)
 
 #if AP_EXTERNAL_AHRS_VECTORNAV_ENABLED
     case DevType::VecNav:
-        backend = new AP_ExternalAHRS_VectorNav(this, state);
+        backend = NEW_NOTHROW AP_ExternalAHRS_VectorNav(this, state);
         return;
 #endif
 
 #if AP_EXTERNAL_AHRS_MICROSTRAIN5_ENABLED
     case DevType::MicroStrain5:
-        backend = new AP_ExternalAHRS_MicroStrain5(this, state);
+        backend = NEW_NOTHROW AP_ExternalAHRS_MicroStrain5(this, state);
         return;
 #endif
 
 #if AP_EXTERNAL_AHRS_MICROSTRAIN7_ENABLED
     case DevType::MicroStrain7:
-        backend = new AP_ExternalAHRS_MicroStrain7(this, state);
+        backend = NEW_NOTHROW AP_ExternalAHRS_MicroStrain7(this, state);
         return;
 #endif
 
 #if AP_EXTERNAL_AHRS_INERTIAL_LABS_ENABLED
     case DevType::InertialLabs:
-        backend = new AP_ExternalAHRS_InertialLabs(this, state);
+        backend = NEW_NOTHROW AP_ExternalAHRS_InertialLabs(this, state);
         return;
 #endif
 
diff --git a/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp b/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp
index 179f05fd9f..af207f54c6 100644
--- a/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp
+++ b/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp
@@ -183,9 +183,9 @@ AP_ExternalAHRS_VectorNav::AP_ExternalAHRS_VectorNav(AP_ExternalAHRS *_frontend,
     port_num = sm.find_portnum(AP_SerialManager::SerialProtocol_AHRS, 0);
 
     bufsize = MAX(MAX(VN_PKT1_LENGTH, VN_PKT2_LENGTH), VN_100_PKT1_LENGTH);
-    pktbuf = new uint8_t[bufsize];
-    last_pkt1 = new VN_packet1;
-    last_pkt2 = new VN_packet2;
+    pktbuf = NEW_NOTHROW uint8_t[bufsize];
+    last_pkt1 = NEW_NOTHROW VN_packet1;
+    last_pkt2 = NEW_NOTHROW VN_packet2;
 
     if (!pktbuf || !last_pkt1 || !last_pkt2) {
         AP_BoardConfig::allocation_error("VectorNav ExternalAHRS");