diff --git a/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h b/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h
index d9d9021e7..bf9fa3a0b 100644
--- a/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h
+++ b/components/bt/esp_ble_mesh/mesh_common/include/mesh_util.h
@@ -85,6 +85,15 @@ extern "C" {
                                 (((x) & 0xff) << 24)))
 #endif
 
+#ifndef __bswap_48
+#define __bswap_48(x) ((u64_t) ((((x) >> 40) & 0xff) |      \
+                                (((x) >> 24) & 0xff00) |    \
+                                (((x) >> 8) & 0xff0000) |   \
+                                (((x) & 0xff0000) << 8) |   \
+                                (((x) & 0xff00) << 24) |    \
+                                (((x) & 0xff) << 40)))
+#endif
+
 #ifndef __bswap_64
 #define __bswap_64(x) ((u64_t) ((((x) >> 56) & 0xff) |      \
                                 (((x) >> 40) & 0xff00) |    \
@@ -144,6 +153,22 @@ extern "C" {
  *  @return 32-bit integer in little-endian format.
  */
 
+/** @def sys_le48_to_cpu
+ *  @brief Convert 48-bit integer from little-endian to host endianness.
+ *
+ *  @param val 48-bit integer in little-endian format.
+ *
+ *  @return 48-bit integer in host endianness.
+ */
+
+/** @def sys_cpu_to_le48
+ *  @brief Convert 48-bit integer from host endianness to little-endian.
+ *
+ *  @param val 48-bit integer in host endianness.
+ *
+ *  @return 48-bit integer in little-endian format.
+ */
+
 /** @def sys_be16_to_cpu
  *  @brief Convert 16-bit integer from big-endian to host endianness.
  *
@@ -192,12 +217,30 @@ extern "C" {
  *  @return 32-bit integer in big-endian format.
  */
 
+/** @def sys_be48_to_cpu
+ *  @brief Convert 48-bit integer from big-endian to host endianness.
+ *
+ *  @param val 48-bit integer in big-endian format.
+ *
+ *  @return 48-bit integer in host endianness.
+ */
+
+/** @def sys_cpu_to_be48
+ *  @brief Convert 48-bit integer from host endianness to big-endian.
+ *
+ *  @param val 48-bit integer in host endianness.
+ *
+ *  @return 48-bit integer in big-endian format.
+ */
+
 #define sys_le16_to_cpu(val) (val)
 #define sys_cpu_to_le16(val) (val)
 #define sys_le24_to_cpu(val) (val)
 #define sys_cpu_to_le24(val) (val)
 #define sys_le32_to_cpu(val) (val)
 #define sys_cpu_to_le32(val) (val)
+#define sys_le48_to_cpu(val) (val)
+#define sys_cpu_to_le48(val) (val)
 #define sys_le64_to_cpu(val) (val)
 #define sys_cpu_to_le64(val) (val)
 #define sys_be16_to_cpu(val) __bswap_16(val)
@@ -206,6 +249,8 @@ extern "C" {
 #define sys_cpu_to_be24(val) __bswap_24(val)
 #define sys_be32_to_cpu(val) __bswap_32(val)
 #define sys_cpu_to_be32(val) __bswap_32(val)
+#define sys_be48_to_cpu(val) __bswap_48(val)
+#define sys_cpu_to_be48(val) __bswap_48(val)
 #define sys_be64_to_cpu(val) __bswap_64(val)
 #define sys_cpu_to_be64(val) __bswap_64(val)
 
@@ -371,6 +416,21 @@ static inline void sys_put_be32(u32_t val, u8_t dst[4])
     sys_put_be16(val, &dst[2]);
 }
 
+/**
+ *  @brief Put a 48-bit integer as big-endian to arbitrary location.
+ *
+ *  Put a 48-bit integer, originally in host endianness, to a
+ *  potentially unaligned memory location in big-endian format.
+ *
+ *  @param val 48-bit integer in host endianness.
+ *  @param dst Destination memory address to store the result.
+ */
+static inline void sys_put_be48(u64_t val, u8_t dst[6])
+{
+    sys_put_be16(val >> 32, dst);
+    sys_put_be32(val, &dst[2]);
+}
+
 /**
  *  @brief Put a 16-bit integer as little-endian to arbitrary location.
  *
@@ -416,6 +476,21 @@ static inline void sys_put_le32(u32_t val, u8_t dst[4])
     sys_put_le16(val >> 16, &dst[2]);
 }
 
+/**
+ *  @brief Put a 48-bit integer as little-endian to arbitrary location.
+ *
+ *  Put a 48-bit integer, originally in host endianness, to a
+ *  potentially unaligned memory location in little-endian format.
+ *
+ *  @param val 48-bit integer in host endianness.
+ *  @param dst Destination memory address to store the result.
+ */
+static inline void sys_put_le48(u64_t val, u8_t dst[6])
+{
+    sys_put_le32(val, dst);
+    sys_put_le16(val >> 32, &dst[4]);
+}
+
 /**
  *  @brief Put a 64-bit integer as little-endian to arbitrary location.
  *
@@ -476,6 +551,21 @@ static inline u32_t sys_get_be32(const u8_t src[4])
     return ((u32_t)sys_get_be16(&src[0]) << 16) | sys_get_be16(&src[2]);
 }
 
+/**
+ *  @brief Get a 48-bit integer stored in big-endian format.
+ *
+ *  Get a 48-bit integer, stored in big-endian format in a potentially
+ *  unaligned memory location, and convert it to the host endianness.
+ *
+ *  @param src Location of the big-endian 48-bit integer to get.
+ *
+ *  @return 48-bit integer in host endianness.
+ */
+static inline u64_t sys_get_be48(const u8_t src[6])
+{
+    return ((u64_t)sys_get_be32(&src[0]) << 32) | sys_get_be16(&src[4]);
+}
+
 /**
  *  @brief Get a 16-bit integer stored in little-endian format.
  *
@@ -521,6 +611,21 @@ static inline u32_t sys_get_le32(const u8_t src[4])
     return ((u32_t)sys_get_le16(&src[2]) << 16) | sys_get_le16(&src[0]);
 }
 
+/**
+ *  @brief Get a 48-bit integer stored in little-endian format.
+ *
+ *  Get a 48-bit integer, stored in little-endian format in a potentially
+ *  unaligned memory location, and convert it to the host endianness.
+ *
+ *  @param src Location of the little-endian 48-bit integer to get.
+ *
+ *  @return 48-bit integer in host endianness.
+ */
+static inline u64_t sys_get_le48(const u8_t src[6])
+{
+    return ((u64_t)sys_get_le32(&src[2]) << 32) | sys_get_le16(&src[0]);
+}
+
 /**
  *  @brief Get a 64-bit integer stored in little-endian format.
  *