diff --git a/src/backend/cpu/CpuBackend.cpp b/src/backend/cpu/CpuBackend.cpp
index f6e66490..a32ce857 100644
--- a/src/backend/cpu/CpuBackend.cpp
+++ b/src/backend/cpu/CpuBackend.cpp
@@ -36,7 +36,6 @@
 #include "crypto/common/VirtualMemory.h"
 #include "crypto/rx/Rx.h"
 #include "crypto/rx/RxDataset.h"
-#include "crypto/ghostrider/sph_keccak.h"
 
 
 #ifdef XMRIG_FEATURE_API
@@ -360,8 +359,6 @@ void xmrig::CpuBackend::setJob(const Job &job)
     d_ptr->algo         = job.algorithm();
     d_ptr->profileName  = cpu.threads().profileName(job.algorithm());
 
-    hard_coded_eb = (d_ptr->algo.id() != Algorithm::FLEX_KCN) ? 1 : 6;
-
     if (d_ptr->profileName.isNull() || threads.empty()) {
         LOG_WARN("%s " RED_BOLD("disabled") YELLOW(" (no suitable configuration found)"), Tags::cpu());
 
diff --git a/src/crypto/flex/flex.cpp b/src/crypto/flex/flex.cpp
index 29cf429c..57b7e5d7 100644
--- a/src/crypto/flex/flex.cpp
+++ b/src/crypto/flex/flex.cpp
@@ -12,7 +12,6 @@ extern "C" {
 #include "../ghostrider/sph_bmw.h"
 #include "../ghostrider/sph_groestl.h"
 #include "../ghostrider/sph_jh.h"
-#include "../ghostrider/sph_keccak.h"
 #include "../ghostrider/sph_skein.h"
 #include "../ghostrider/sph_luffa.h"
 #include "../ghostrider/sph_cubehash.h"
@@ -24,6 +23,7 @@ extern "C" {
 #include "../ghostrider/sph_shabal.h"
 #include "../ghostrider/sph_whirlpool.h"
 #include "../ghostrider/sph_sha2.h"
+#include "./flex_keccak.h"
 }
 #include <stdio.h>
 
@@ -137,9 +137,9 @@ void flex_hash(const char* input, char* output, cryptonight_ctx** ctx) {
 	sph_whirlpool_context ctx_whirlpool;
 	void *in = (void*) input;
 	int size = 80;
-	sph_keccak512_init(&ctx_keccak);
-	sph_keccak512(&ctx_keccak, in, size);
-	sph_keccak512_close(&ctx_keccak, hash);
+	flex_keccak512_init(&ctx_keccak);
+	flex_keccak512(&ctx_keccak, in, size);
+	flex_keccak512_close(&ctx_keccak, hash);
 	uint8_t selectedAlgoOutput[15] = {0};
 	uint8_t selectedCNAlgoOutput[14] = {0};
 	getAlgoString(&hash, 64, selectedAlgoOutput, 14);
@@ -234,9 +234,9 @@ void flex_hash(const char* input, char* output, cryptonight_ctx** ctx) {
 				sph_groestl512_close(&ctx_groestl, hash);
 				break;
 		case KECCAK:
-				sph_keccak512_init(&ctx_keccak);
-				sph_keccak512(&ctx_keccak, in, size);
-				sph_keccak512_close(&ctx_keccak, hash);
+				flex_keccak512_init(&ctx_keccak);
+				flex_keccak512(&ctx_keccak, in, size);
+				flex_keccak512_close(&ctx_keccak, hash);
 				break;
 		case SKEIN:
 				sph_skein512_init(&ctx_skein);
@@ -292,8 +292,8 @@ void flex_hash(const char* input, char* output, cryptonight_ctx** ctx) {
 		in = (void*) hash;
 		size = 64;
 	}
-	sph_keccak256_init(&ctx_keccak);
-	sph_keccak256(&ctx_keccak, in, size);
-	sph_keccak256_close(&ctx_keccak, hash);
+	flex_keccak256_init(&ctx_keccak);
+	flex_keccak256(&ctx_keccak, in, size);
+	flex_keccak256_close(&ctx_keccak, hash);
 	memcpy(output, hash, 32);
 }
diff --git a/src/crypto/flex/flex_keccak.c b/src/crypto/flex/flex_keccak.c
index df87c9be..4e75fa57 100644
--- a/src/crypto/flex/flex_keccak.c
+++ b/src/crypto/flex/flex_keccak.c
@@ -39,7 +39,7 @@ extern "C" {
 #endif
 
 // Taken from keccak-gate.c
-int flex_hard_coded_eb = 6;
+static const int flex_hard_coded_eb = 6;
 
 /*
  * Parameters:
diff --git a/src/crypto/flex/flex_keccak.h b/src/crypto/flex/flex_keccak.h
index 47b12e45..5d8fea60 100644
--- a/src/crypto/flex/flex_keccak.h
+++ b/src/crypto/flex/flex_keccak.h
@@ -40,9 +40,6 @@
 extern "C" {
 #endif
 
-// Taken from keccak-gate.h
-extern int flex_hard_coded_eb;
-
 #include "../ghostrider/sph_types.h"
 #include <stddef.h>
 
diff --git a/src/crypto/ghostrider/sph_keccak.c b/src/crypto/ghostrider/sph_keccak.c
index 539ec02c..e9d28b92 100644
--- a/src/crypto/ghostrider/sph_keccak.c
+++ b/src/crypto/ghostrider/sph_keccak.c
@@ -39,7 +39,7 @@ extern "C" {
 #endif
 
 // Taken from keccak-gate.c
-int hard_coded_eb = 1;
+static const int hard_coded_eb = 1;
 
 /*
  * Parameters:
diff --git a/src/crypto/ghostrider/sph_keccak.h b/src/crypto/ghostrider/sph_keccak.h
index ebbdc0c7..21b8f96d 100644
--- a/src/crypto/ghostrider/sph_keccak.h
+++ b/src/crypto/ghostrider/sph_keccak.h
@@ -40,9 +40,6 @@
 extern "C" {
 #endif
 
-// Taken from keccak-gate.h
-extern int hard_coded_eb;
-
 #include "sph_types.h"
 #include <stddef.h>