diff --git a/package/tinydtls/0001-sha2-sha2.c-fix-build-on-big-endian.patch b/package/tinydtls/0001-sha2-sha2.c-fix-build-on-big-endian.patch
new file mode 100644
index 0000000000..81cf26bb4b
--- /dev/null
+++ b/package/tinydtls/0001-sha2-sha2.c-fix-build-on-big-endian.patch
@@ -0,0 +1,119 @@
+From 608738ccad9ac3743ccd535bde1e84f401e6176f Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Sat, 20 Jun 2020 12:50:40 +0200
+Subject: [PATCH] sha2/sha2.c: fix build on big endian
+
+Build is broken since 865ec9ba1d44e629c1107c299aebd20e901a19ff because
+tmp is undefined in put32be and put64be:
+
+sha2.c: In function 'put32be':
+sha2.c:177:34: error: 'tmp' undeclared (first use in this function)
+  MEMCPY_BCOPY(data, &val, sizeof(tmp));
+                                  ^~~
+
+Fix this error by replacing tmp by val
+
+Moreover, move MEMCPY_BCOPY before its usage or linking step will fail
+
+Fixes:
+ - http://autobuild.buildroot.org/results/e8704e02fdede7b63e22da552292977b23380b32
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/eclipse/tinydtls/pull/37]
+---
+ sha2/sha2.c | 58 ++++++++++++++++++++++++++---------------------------
+ 1 file changed, 29 insertions(+), 29 deletions(-)
+
+diff --git a/sha2/sha2.c b/sha2/sha2.c
+index cb6d90f..5c794c6 100644
+--- a/sha2/sha2.c
++++ b/sha2/sha2.c
+@@ -114,6 +114,33 @@
+ #error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN
+ #endif
+ 
++/*
++ * Macros for copying blocks of memory and for zeroing out ranges
++ * of memory.  Using these macros makes it easy to switch from
++ * using memset()/memcpy() and using bzero()/bcopy().
++ *
++ * Please define either SHA2_USE_MEMSET_MEMCPY or define
++ * SHA2_USE_BZERO_BCOPY depending on which function set you
++ * choose to use:
++ */
++#if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
++/* Default to memset()/memcpy() if no option is specified */
++#define	SHA2_USE_MEMSET_MEMCPY	1
++#endif
++#if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
++/* Abort with an error if BOTH options are defined */
++#error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
++#endif
++
++#ifdef SHA2_USE_MEMSET_MEMCPY
++#define MEMSET_BZERO(p,l)	memset((p), 0, (l))
++#define MEMCPY_BCOPY(d,s,l)	memcpy((d), (s), (l))
++#endif
++#ifdef SHA2_USE_BZERO_BCOPY
++#define MEMSET_BZERO(p,l)	bzero((p), (l))
++#define MEMCPY_BCOPY(d,s,l)	bcopy((s), (d), (l))
++#endif
++
+ /*
+  * Define the followingsha2_* types to types of the correct length on
+  * the native archtecture.   Most BSD systems and Linux define u_intXX_t
+@@ -174,7 +201,7 @@ static inline void put32be(sha2_byte* data, sha2_word32 val)
+ 	data[1] = val; val >>= 8;
+ 	data[0] = val;
+ #else /* BYTE_ORDER != LITTLE_ENDIAN */
+-	MEMCPY_BCOPY(data, &val, sizeof(tmp));
++	MEMCPY_BCOPY(data, &val, sizeof(val));
+ #endif /* BYTE_ORDER != LITTLE_ENDIAN */
+ }
+ 
+@@ -209,7 +236,7 @@ static inline void put64be(sha2_byte* data, sha2_word64 val)
+ 	data[1] = val; val >>= 8;
+ 	data[0] = val;
+ #else /* BYTE_ORDER != LITTLE_ENDIAN */
+-	MEMCPY_BCOPY(data, &val, sizeof(tmp));
++	MEMCPY_BCOPY(data, &val, sizeof(val));
+ #endif /* BYTE_ORDER != LITTLE_ENDIAN */
+ }
+ 
+@@ -225,33 +252,6 @@ static inline void put64be(sha2_byte* data, sha2_word64 val)
+ 	} \
+ }
+ 
+-/*
+- * Macros for copying blocks of memory and for zeroing out ranges
+- * of memory.  Using these macros makes it easy to switch from
+- * using memset()/memcpy() and using bzero()/bcopy().
+- *
+- * Please define either SHA2_USE_MEMSET_MEMCPY or define
+- * SHA2_USE_BZERO_BCOPY depending on which function set you
+- * choose to use:
+- */
+-#if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY)
+-/* Default to memset()/memcpy() if no option is specified */
+-#define	SHA2_USE_MEMSET_MEMCPY	1
+-#endif
+-#if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY)
+-/* Abort with an error if BOTH options are defined */
+-#error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both!
+-#endif
+-
+-#ifdef SHA2_USE_MEMSET_MEMCPY
+-#define MEMSET_BZERO(p,l)	memset((p), 0, (l))
+-#define MEMCPY_BCOPY(d,s,l)	memcpy((d), (s), (l))
+-#endif
+-#ifdef SHA2_USE_BZERO_BCOPY
+-#define MEMSET_BZERO(p,l)	bzero((p), (l))
+-#define MEMCPY_BCOPY(d,s,l)	bcopy((s), (d), (l))
+-#endif
+-
+ 
+ /*** THE SIX LOGICAL FUNCTIONS ****************************************/
+ /*
+-- 
+2.26.2
+
