diff --git a/Makefile b/Makefile
index cd9aefd..40e709c 100644
--- a/Makefile
+++ b/Makefile
@@ -66,12 +66,13 @@ HEADERS= Makefile $(shell find . -name "*.h") build/timestamp
 
 LIBCOMPONENTS= build/goldilocks.o build/barrett_field.o build/crandom.o \
   build/$(FIELD).o build/ec_point.o build/scalarmul.o build/sha512.o build/magic.o \
-	build/f_arithmetic.o build/arithmetic.o build/decaf.o
+	build/f_arithmetic.o build/arithmetic.o build/decaf.o build/shake.o
 
 TESTCOMPONENTS=build/test.o build/test_scalarmul.o build/test_sha512.o \
-	build/test_pointops.o build/test_arithmetic.o build/test_goldilocks.o build/magic.o
+	build/test_pointops.o build/test_arithmetic.o build/test_goldilocks.o build/magic.o \
+	build/shake.o
 
-BENCHCOMPONENTS=build/bench.o
+BENCHCOMPONENTS=build/bench.o build/shake.o
 
 BATBASE=ed448goldilocks-bats-$(TODAY)
 BATNAME=build/$(BATBASE)
diff --git a/include/shake.h b/include/shake.h
index e47d2df..22cbd65 100644
--- a/include/shake.h
+++ b/include/shake.h
@@ -14,6 +14,8 @@
 
 #include <stdint.h>
 
+#define API_VIS __attribute__((visibility("default")))
+
 #ifndef INTERNAL_SPONGE_STRUCT
     typedef struct keccak_sponge_s {
         uint64_t opaque[26];
@@ -29,7 +31,7 @@
 void sponge_init (
     keccak_sponge_t sponge,
     const struct kparams_s *params
-);
+) API_VIS;
 
 /**
  * @brief Absorb data into a SHA3 or SHAKE hash context.
@@ -41,7 +43,7 @@ void sha3_update (
     struct keccak_sponge_s * __restrict__ sponge,
     const uint8_t *in,
     size_t len
-);
+) API_VIS;
 
 /**
  * @brief Squeeze output data from a SHA3 or SHAKE hash context.
@@ -56,7 +58,7 @@ void sha3_output (
     keccak_sponge_t sponge,
     uint8_t * __restrict__ out,
     size_t len
-);
+) API_VIS;
 
 /**
  * @brief Destroy a SHA3 or SHAKE sponge context by overwriting it with 0.
@@ -64,8 +66,7 @@ void sha3_output (
  */  
 void sponge_destroy (
     keccak_sponge_t sponge
-);
-
+) API_VIS;
 
 /**
  * @brief Hash (in) to (out)
@@ -80,12 +81,12 @@ void sponge_hash (
     uint8_t *out,
     size_t outlen,
     const struct kparams_s *params
-);
+) API_VIS;
 
 /* TODO: expand/doxygenate individual SHAKE/SHA3 instances? */
 
 #define DECSHAKE(n) \
-    extern const struct kparams_s *SHAKE##n##_params; \
+    extern const struct kparams_s *SHAKE##n##_params API_VIS; \
     static inline void shake##n##_init(keccak_sponge_t sponge) { \
         sponge_init(sponge, SHAKE##n##_params); \
     } \
@@ -104,7 +105,7 @@ void sponge_hash (
     }
     
 #define DECSHA3(n) \
-    extern const struct kparams_s *SHA3_##n##_params; \
+    extern const struct kparams_s *SHA3_##n##_params API_VIS; \
     static inline void sha3_##n##_init(keccak_sponge_t sponge) { \
         sponge_init(sponge, SHA3_##n##_params); \
     } \
@@ -129,4 +130,6 @@ DECSHA3(256)
 DECSHA3(384)
 DECSHA3(512)
     
+#undef API_VIS
+    
 #endif /* __SHAKE_H__ */
diff --git a/test/bench.c b/test/bench.c
index 75b79e1..346329c 100644
--- a/test/bench.c
+++ b/test/bench.c
@@ -17,6 +17,7 @@
 #include "goldilocks.h"
 #include "sha512.h"
 #include "decaf.h"
+#include "shake.h"
 
 static __inline__ void
 ignore_result ( int result ) {
@@ -164,6 +165,13 @@ int main(int argc, char **argv) {
     when = now() - when;
     printf("sha512 blk:  %5.1fns (%0.2f MB/s)\n", when * 1e9 / i, 128*i/when/1e6);
     
+    when = now();
+    for (i=0; i<nbase; i++) {
+        shake256_hash(hashout,128,hashout,128);
+    }
+    when = now() - when;
+    printf("shake  1blk: %5.1fns\n", when * 1e9 / i);
+    
     when = now();
     for (i=0; i<nbase; i++) {
         field_isr(c, a);