diff --git a/src/headers/tomcrypt_misc.h b/src/headers/tomcrypt_misc.h
index d538077..2f670cc 100644
--- a/src/headers/tomcrypt_misc.h
+++ b/src/headers/tomcrypt_misc.h
@@ -95,7 +95,7 @@ int crc32_test(void);
 
 /* yeah it's not exactly in misc in the library, but in testprof/x86_prof.c */
 #if defined(LTC_TEST) && defined(LTC_TEST_DBG)
-void print_hex(const char* what, const unsigned char* p, const unsigned long l);
+void print_hex(const char* what, const void* p, const unsigned long l);
 #endif
 
 /* $Source$ */
diff --git a/testprof/tomcrypt_test.h b/testprof/tomcrypt_test.h
index f6951fc..abb5fc8 100644
--- a/testprof/tomcrypt_test.h
+++ b/testprof/tomcrypt_test.h
@@ -80,7 +80,7 @@ extern int no_results;
 extern const struct ltc_prng_descriptor no_prng_desc;
 #endif
 
-void print_hex(const char* what, const unsigned char* p, const unsigned long l);
+void print_hex(const char* what, const void* v, const unsigned long l);
 int sorter(const void *a, const void *b);
 void tally_results(int type);
 ulong64 rdtsc (void);
diff --git a/testprof/x86_prof.c b/testprof/x86_prof.c
index ba12db2..baf03d2 100644
--- a/testprof/x86_prof.c
+++ b/testprof/x86_prof.c
@@ -2,8 +2,9 @@
 
 prng_state yarrow_prng;
 
-void print_hex(const char* what, const unsigned char* p, const unsigned long l)
+void print_hex(const char* what, const void* v, const unsigned long l)
 {
+  const unsigned char* p = v;
   unsigned long x;
   fprintf(stderr, "%s contents: \n", what);
   for (x = 0; x < l; ) {