diff --git a/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-Use-__builtin_bswap32-on-Clang-if-supported.patch b/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-Use-__builtin_bswap32-on-Clang-if-supported.patch
new file mode 100644
index 0000000000..83b16f2e2f
--- /dev/null
+++ b/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-Use-__builtin_bswap32-on-Clang-if-supported.patch
@@ -0,0 +1,32 @@
+From 36637cd802fac9402be76f2a9358a26b7f6aa530 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Wed, 20 Nov 2019 13:41:39 -0800
+Subject: [PATCH] Use __builtin_bswap32 on Clang if supported
+
+clang pretends to be gcc 4.2.1 so GCC_VERSION macro will decide that
+__builtin_bswap32 is not supported on clang, whereas in reality it might
+so its better to add a check for enquiring clang if it supports
+__builtin_bswap32 or not
+
+Upstream-Status: Submitted [https://github.com/smuellerDD/libkcapi/pull/83]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ lib/kcapi-kdf.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/kcapi-kdf.c b/lib/kcapi-kdf.c
+index 9e53a0b..428ecaf 100644
+--- a/lib/kcapi-kdf.c
++++ b/lib/kcapi-kdf.c
+@@ -57,7 +57,7 @@
+ #define GCC_VERSION (__GNUC__ * 10000		\
+ 		     + __GNUC_MINOR__ * 100	\
+ 		     + __GNUC_PATCHLEVEL__)
+-#if GCC_VERSION >= 40400
++#if GCC_VERSION >= 40400 || (defined(__clang__) && __has_builtin(__builtin_bswap32))
+ # define __HAVE_BUILTIN_BSWAP32__
+ #endif
+ 
+-- 
+2.24.0
+
diff --git a/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-kcapi-kdf-Move-code-to-fix.patch b/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-kcapi-kdf-Move-code-to-fix.patch
index 3dd7ea7f9b..7ed9caf096 100644
--- a/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-kcapi-kdf-Move-code-to-fix.patch
+++ b/meta-oe/recipes-crypto/libkcapi/libkcapi/0001-kcapi-kdf-Move-code-to-fix.patch
@@ -1,4 +1,4 @@
-From 00c1654e368f728b213c4e3782045d54098edb25 Mon Sep 17 00:00:00 2001
+From 8f961521add49278b48c9721fc53e05ee3543b74 Mon Sep 17 00:00:00 2001
 From: Khem Raj <raj.khem@gmail.com>
 Date: Sat, 16 Nov 2019 23:03:51 -0800
 Subject: [PATCH] kcapi-kdf: Move code to fix
@@ -6,13 +6,14 @@ Subject: [PATCH] kcapi-kdf: Move code to fix
 Fixes clang build
 unused function '_bswap32' [-Werror,-Wunused-function]
 
+Upstream-Status: Submitted [https://github.com/smuellerDD/libkcapi/pull/83]
 Signed-off-by: Khem Raj <raj.khem@gmail.com>
 ---
- lib/kcapi-kdf.c | 36 ++++++++++++++++--------------------
- 1 file changed, 16 insertions(+), 20 deletions(-)
+ lib/kcapi-kdf.c | 37 +++++++++++++++++--------------------
+ 1 file changed, 17 insertions(+), 20 deletions(-)
 
 diff --git a/lib/kcapi-kdf.c b/lib/kcapi-kdf.c
-index ea39846..8e4a636 100644
+index ea39846..9e53a0b 100644
 --- a/lib/kcapi-kdf.c
 +++ b/lib/kcapi-kdf.c
 @@ -54,6 +54,20 @@
@@ -26,17 +27,17 @@ index ea39846..8e4a636 100644
 +# define __HAVE_BUILTIN_BSWAP32__
 +#endif
 +
-+#ifdef __HAVE_BUILTIN_BSWAP32__
-+# define be_bswap32(x) (uint32_t)__builtin_bswap32((uint32_t)(x))
 +/* Endian dependent byte swap operations.  */
-+#elif  __BYTE_ORDER__ ==  __ORDER_BIG_ENDIAN__
++#if  __BYTE_ORDER__ ==  __ORDER_BIG_ENDIAN__
 +# define be_bswap32(x) ((uint32_t)(x))
 +#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-+
++# ifdef __HAVE_BUILTIN_BSWAP32__
++#  define be_bswap32(x) (uint32_t)__builtin_bswap32((uint32_t)(x))
++# else
  static inline uint32_t rol32(uint32_t x, int n)
  {
  	return ( (x << (n&(32-1))) | (x >> ((32-n)&(32-1))) );
-@@ -68,27 +82,9 @@ static inline uint32_t _bswap32(uint32_t x)
+@@ -68,27 +82,10 @@ static inline uint32_t _bswap32(uint32_t x)
  {
  	return ((rol32(x, 8) & 0x00ff00ffL) | (ror32(x, 8) & 0xff00ff00L));
  }
@@ -59,10 +60,11 @@ index ea39846..8e4a636 100644
 -# define be_bswap32(x) ((uint32_t)(x))
 -#elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 -# define be_bswap32(x) _swap32(x)
-+# define be_bswap32(x) _bswap32(x)
++#  define be_bswap32(x) _bswap32(x)
++# endif
  #else
 -#error "Endianess not defined"
-+# error "Neither builtin_bswap32 nor endianess defined"
++# error "endianess not defined"
  #endif
  
  DSO_PUBLIC
diff --git a/meta-oe/recipes-crypto/libkcapi/libkcapi_git.bb b/meta-oe/recipes-crypto/libkcapi/libkcapi_git.bb
index aa438e5859..4e217a351d 100644
--- a/meta-oe/recipes-crypto/libkcapi/libkcapi_git.bb
+++ b/meta-oe/recipes-crypto/libkcapi/libkcapi_git.bb
@@ -11,6 +11,7 @@ PV = "1.1.5"
 SRC_URI = " \
     git://github.com/smuellerDD/libkcapi.git \
     file://0001-kcapi-kdf-Move-code-to-fix.patch \
+    file://0001-Use-__builtin_bswap32-on-Clang-if-supported.patch \
 "
 
 inherit autotools
