diff --git a/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp b/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp
index 3e58710799d031..38f44ed1501118 100644
--- a/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp
+++ b/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.cpp
@@ -16,7 +16,6 @@
   support for serial connected AHRS systems
  */
 
-#include <cstdint>
 #define ALLOW_DOUBLE_MATH_FUNCTIONS
 
 #include "AP_ExternalAHRS_config.h"
diff --git a/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.h b/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.h
index 456090d205f00a..9c1639640a1e00 100644
--- a/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.h
+++ b/libraries/AP_ExternalAHRS/AP_ExternalAHRS_VectorNav.h
@@ -73,13 +73,13 @@ class AP_ExternalAHRS_VectorNav : public AP_ExternalAHRS_backend {
     uint16_t pktoffset;
     uint16_t bufsize;
 
-    struct VN_imu_packet *latest_imu_packet = nullptr;
-    struct VN_INS_ekf_packet *latest_ins_ekf_packet = nullptr;
-    struct VN_INS_gnss_packet *latest_ins_gnss_packet = nullptr;
+    struct VN_imu_packet *latest_imu_packet;
+    struct VN_INS_ekf_packet *latest_ins_ekf_packet;
+    struct VN_INS_gnss_packet *latest_ins_gnss_packet;
 
-    uint32_t last_pkt1_ms = UINT32_MAX;
-    uint32_t last_pkt2_ms = UINT32_MAX;
-    uint32_t last_pkt3_ms = UINT32_MAX;
+    uint32_t last_pkt1_ms;
+    uint32_t last_pkt2_ms;
+    uint32_t last_pkt3_ms;
 
     enum class TYPE {
         VN_INS,  // Full INS mode, requiring GNSS. Used by VN-2X0 and VN-3X0