diff --git a/Makefile b/Makefile
index 04d0fd1fe6..52a9f97997 100644
--- a/Makefile
+++ b/Makefile
@@ -182,6 +182,8 @@ include shared.mak
 #
 # Define BLK_SHA256 to use the built-in SHA-256 routines.
 #
+# Define NETTLE_SHA256 to use the SHA-256 routines in libnettle.
+#
 # Define GCRYPT_SHA256 to use the SHA-256 routines in libgcrypt.
 #
 # Define OPENSSL_SHA256 to use the SHA-256 routines in OpenSSL.
@@ -1842,6 +1844,10 @@ ifdef OPENSSL_SHA256
 	EXTLIBS += $(LIB_4_CRYPTO)
 	BASIC_CFLAGS += -DSHA256_OPENSSL
 else
+ifdef NETTLE_SHA256
+	BASIC_CFLAGS += -DSHA256_NETTLE
+	EXTLIBS += -lnettle
+else
 ifdef GCRYPT_SHA256
 	BASIC_CFLAGS += -DSHA256_GCRYPT
 	EXTLIBS += -lgcrypt
@@ -1850,6 +1856,7 @@ else
 	BASIC_CFLAGS += -DSHA256_BLK
 endif
 endif
+endif
 
 ifdef SHA1_MAX_BLOCK_SIZE
 	LIB_OBJS += compat/sha1-chunked.o
@@ -3091,6 +3098,9 @@ $(SP_OBJ): %.sp: %.c %.o
 sparse: $(SP_OBJ)
 
 EXCEPT_HDRS := $(GENERATED_H) unicode-width.h compat/% xdiff/%
+ifndef NETTLE_SHA256
+	EXCEPT_HDRS += sha256/nettle.h
+endif
 ifndef GCRYPT_SHA256
 	EXCEPT_HDRS += sha256/gcrypt.h
 endif
diff --git a/hash.h b/hash.h
index 5d40368f18..ea87ae9d92 100644
--- a/hash.h
+++ b/hash.h
@@ -16,7 +16,9 @@
 #include "block-sha1/sha1.h"
 #endif
 
-#if defined(SHA256_GCRYPT)
+#if defined(SHA256_NETTLE)
+#include "sha256/nettle.h"
+#elif defined(SHA256_GCRYPT)
 #define SHA256_NEEDS_CLONE_HELPER
 #include "sha256/gcrypt.h"
 #elif defined(SHA256_OPENSSL)
diff --git a/sha256/nettle.h b/sha256/nettle.h
new file mode 100644
index 0000000000..b63e1c8190
--- /dev/null
+++ b/sha256/nettle.h
@@ -0,0 +1,31 @@
+#ifndef SHA256_NETTLE_H
+#define SHA256_NETTLE_H
+
+#include <nettle/sha2.h>
+
+typedef struct sha256_ctx nettle_SHA256_CTX;
+
+static inline void nettle_SHA256_Init(nettle_SHA256_CTX *ctx)
+{
+	sha256_init(ctx);
+}
+
+static inline void nettle_SHA256_Update(nettle_SHA256_CTX *ctx,
+					const void *data,
+					size_t len)
+{
+	sha256_update(ctx, len, data);
+}
+
+static inline void nettle_SHA256_Final(unsigned char *digest,
+				       nettle_SHA256_CTX *ctx)
+{
+	sha256_digest(ctx, SHA256_DIGEST_SIZE, digest);
+}
+
+#define platform_SHA256_CTX nettle_SHA256_CTX
+#define platform_SHA256_Init nettle_SHA256_Init
+#define platform_SHA256_Update nettle_SHA256_Update
+#define platform_SHA256_Final nettle_SHA256_Final
+
+#endif