diff --git a/porting/nimble/include/os/endian.h b/porting/nimble/include/os/endian.h
index ca8698d43..e02307569 100644
--- a/porting/nimble/include/os/endian.h
+++ b/porting/nimble/include/os/endian.h
@@ -204,15 +204,19 @@ extern "C" {
 #endif
 
 void put_le16(void *buf, uint16_t x);
+void put_le24(void *buf, uint32_t x);
 void put_le32(void *buf, uint32_t x);
 void put_le64(void *buf, uint64_t x);
 uint16_t get_le16(const void *buf);
+uint32_t get_le24(const void *buf);
 uint32_t get_le32(const void *buf);
 uint64_t get_le64(const void *buf);
 void put_be16(void *buf, uint16_t x);
+void put_be24(void *buf, uint32_t x);
 void put_be32(void *buf, uint32_t x);
 void put_be64(void *buf, uint64_t x);
 uint16_t get_be16(const void *buf);
+uint32_t get_be24(const void *buf);
 uint32_t get_be32(const void *buf);
 uint64_t get_be64(const void *buf);
 void swap_in_place(void *buf, int len);
diff --git a/porting/nimble/src/endian.c b/porting/nimble/src/endian.c
index 1311f43ef..2afd6a22e 100644
--- a/porting/nimble/src/endian.c
+++ b/porting/nimble/src/endian.c
@@ -29,6 +29,17 @@ put_le16(void *buf, uint16_t x)
     u8ptr[1] = (uint8_t)(x >> 8);
 }
 
+void
+put_le24(void *buf, uint32_t x)
+{
+    uint8_t *u8ptr;
+
+    u8ptr = buf;
+    u8ptr[0] = (uint8_t)x;
+    u8ptr[1] = (uint8_t)(x >> 8);
+    u8ptr[2] = (uint8_t)(x >> 16);
+}
+
 void
 put_le32(void *buf, uint32_t x)
 {
@@ -70,6 +81,20 @@ get_le16(const void *buf)
     return x;
 }
 
+uint32_t
+get_le24(const void *buf)
+{
+    const uint8_t *u8ptr;
+    uint32_t x;
+
+    u8ptr = buf;
+    x = u8ptr[0];
+    x |= (uint32_t)u8ptr[1] << 8;
+    x |= (uint32_t)u8ptr[2] << 16;
+
+    return x;
+}
+
 uint32_t
 get_le32(const void *buf)
 {
@@ -114,6 +139,17 @@ put_be16(void *buf, uint16_t x)
     u8ptr[1] = (uint8_t)x;
 }
 
+void
+put_be24(void *buf, uint32_t x)
+{
+    uint8_t *u8ptr;
+
+    u8ptr = buf;
+    u8ptr[0] = (uint8_t)(x >> 24);
+    u8ptr[1] = (uint8_t)(x >> 16);
+    u8ptr[2] = (uint8_t)(x >> 8);
+}
+
 void
 put_be32(void *buf, uint32_t x)
 {
@@ -155,6 +191,20 @@ get_be16(const void *buf)
     return x;
 }
 
+uint32_t
+get_be24(const void *buf)
+{
+    const uint8_t *u8ptr;
+    uint32_t x;
+
+    u8ptr = buf;
+    x = (uint32_t)u8ptr[0] << 24;
+    x |= (uint32_t)u8ptr[1] << 16;
+    x |= (uint32_t)u8ptr[2] << 8;
+
+    return x;
+}
+
 uint32_t
 get_be32(const void *buf)
 {