diff --git a/libraries/AP_HAL/utility/sparse-endian.h b/libraries/AP_HAL/utility/sparse-endian.h
index dc826623cc..6d3817bb62 100644
--- a/libraries/AP_HAL/utility/sparse-endian.h
+++ b/libraries/AP_HAL/utility/sparse-endian.h
@@ -88,16 +88,20 @@ static inline uint64_t be64toh(be64_t value) { return bswap_64_on_le((uint64_t _
 static inline uint16_t le16toh_ptr(const uint8_t *p) { return p[0] | (p[1]<<8U); }
 static inline uint32_t le24toh_ptr(const uint8_t *p) { return p[0] | (p[1]<<8U) | (p[2]<<16U); }
 static inline uint32_t le32toh_ptr(const uint8_t *p) { return p[0] | (p[1]<<8U) | (p[2]<<16U) | (p[3]<<24U); }
+static inline uint64_t le64toh_ptr(const uint8_t *p) { return (uint64_t) p[0] | ((uint64_t) p[1]<<8ULL) | ((uint64_t) p[2]<<16U) | ((uint64_t) p[3]<<24U) | ((uint64_t) p[4]<<32U) | ((uint64_t) p[5]<<40U) | ((uint64_t) p[6]<<48U) | ((uint64_t) p[7]<<56U); }
 static inline uint16_t be16toh_ptr(const uint8_t *p) { return p[1] | (p[0]<<8U); }
 static inline uint32_t be24toh_ptr(const uint8_t *p) { return p[2] | (p[1]<<8U) | (p[0]<<16U); }
 static inline uint32_t be32toh_ptr(const uint8_t *p) { return p[3] | (p[2]<<8U) | (p[1]<<16U) | (p[0]<<24U); }
+static inline uint64_t be64toh_ptr(const uint8_t *p) { return (uint64_t) p[7] | ((uint64_t) p[6]<<8ULL) | ((uint64_t) p[5]<<16U) | ((uint64_t) p[4]<<24U) | ((uint64_t) p[3]<<32U) | ((uint64_t) p[2]<<40U) | ((uint64_t) p[1]<<48U) | ((uint64_t) p[0]<<56U); }
 
 static inline void put_le16_ptr(uint8_t *p, uint16_t v) { p[0] = (v&0xFF); p[1] = (v>>8); }
 static inline void put_le24_ptr(uint8_t *p, uint32_t v) { p[0] = (v&0xFF); p[1] = (v>>8)&0xFF; p[2] = (v>>16)&0xFF; }
 static inline void put_le32_ptr(uint8_t *p, uint32_t v) { p[0] = (v&0xFF); p[1] = (v>>8)&0xFF; p[2] = (v>>16)&0xFF; p[3] = (v>>24)&0xFF; }
+static inline void put_le64_ptr(uint8_t *p, uint64_t v) { p[0] = (v&0xFF); p[1] = (v>>8)&0xFF; p[2] = (v>>16)&0xFF; p[3] = (v>>24)&0xFF; p[4] = (v>>24)&0xFF;p[5] = (v>>24)&0xFF;;p[6] = (v>>24)&0xFF;p[7] = (v>>24)&0xFF;}
 static inline void put_be16_ptr(uint8_t *p, uint16_t v) { p[1] = (v&0xFF); p[0] = (v>>8); }
 static inline void put_be24_ptr(uint8_t *p, uint32_t v) { p[2] = (v&0xFF); p[1] = (v>>8)&0xFF; p[0] = (v>>16)&0xFF; }
 static inline void put_be32_ptr(uint8_t *p, uint32_t v) { p[3] = (v&0xFF); p[2] = (v>>8)&0xFF; p[1] = (v>>16)&0xFF; p[0] = (v>>24)&0xFF; }
+static inline void put_be64_ptr(uint8_t *p, uint64_t v) { p[7] = (v&0xFF); p[6] = (v>>8)&0xFF; p[5] = (v>>16)&0xFF; p[4] = (v>>24)&0xFF; p[3] = (v>>32)&0xFF;p[2] = (v>>40)&0xFF;;p[1] = (v>>48)&0xFF;p[0] = (v>>56)&0xFF;}
 
 #undef __ap_bitwise
 #undef __ap_force