diff -up dovecot-2.2.27/src/lib/sha3.c.than dovecot-2.2.27/src/lib/sha3.c
--- dovecot-2.2.27/src/lib/sha3.c.than	2016-12-13 07:46:26.173797063 -0500
+++ dovecot-2.2.27/src/lib/sha3.c	2016-12-13 07:45:47.693129174 -0500
@@ -232,7 +232,7 @@ sha3_finalize(struct sha3_ctx *ctx)
 			SHA3_CONST(0x8000000000000000UL);
 	keccakf(ctx->s);
 
-#ifndef WORDS_BIGENDIAN
+#ifdef WORDS_BIGENDIAN
 	{
 		unsigned i;
 		for(i = 0; i < SHA3_KECCAK_SPONGE_WORDS; i++) {