diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 0.33
+
+* Add "crypton_" prefix to the final C symbols.
+  [#9](https://github.com/kazu-yamamoto/crypton/pull/9)
+
 ## 0.32
 
 * All C symbols now have the "crypton_" prefix.
diff --git a/cbits/aes/x86ni.c b/cbits/aes/x86ni.c
--- a/cbits/aes/x86ni.c
+++ b/cbits/aes/x86ni.c
@@ -174,8 +174,8 @@
 
 #ifdef WITH_PCLMUL
 
-__m128i (*gfmul_branch_ptr)(__m128i a, const table_4bit t) = gfmul_generic;
-#define gfmul(a,t) ((*gfmul_branch_ptr)(a,t))
+__m128i (*crypton_gfmul_branch_ptr)(__m128i a, const table_4bit t) = gfmul_generic;
+#define gfmul(a,t) ((*crypton_gfmul_branch_ptr)(a,t))
 
 /* See Intel carry-less-multiplication-instruction-in-gcm-mode-paper.pdf
  *
@@ -257,7 +257,7 @@
 
 void crypton_aesni_init_pclmul(void)
 {
-	gfmul_branch_ptr = gfmul_pclmuldq;
+	crypton_gfmul_branch_ptr = gfmul_pclmuldq;
 }
 
 #else
diff --git a/cbits/blake2/sse/blake2s.c b/cbits/blake2/sse/blake2s.c
--- a/cbits/blake2/sse/blake2s.c
+++ b/cbits/blake2/sse/blake2s.c
@@ -258,7 +258,7 @@
 }
 
 /* inlen, at least, should be uint64_t. Others can be size_t. */
-int blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen )
+int crypton_blake2s( void *out, size_t outlen, const void *in, size_t inlen, const void *key, size_t keylen )
 {
   blake2s_state S[1];
 
@@ -290,7 +290,7 @@
 #if defined(SUPERCOP)
 int crypto_hash( unsigned char *out, unsigned char *in, unsigned long long inlen )
 {
-  return blake2s( out, BLAKE2S_OUTBYTES, in, inlen, NULL, 0 );
+  return crypton_blake2s( out, BLAKE2S_OUTBYTES, in, inlen, NULL, 0 );
 }
 #endif
 
diff --git a/crypton.cabal b/crypton.cabal
--- a/crypton.cabal
+++ b/crypton.cabal
@@ -1,5 +1,5 @@
 Name:                crypton
-version:             0.32
+version:             0.33
 Synopsis:            Cryptography Primitives sink
 Description:
     A repository of cryptographic primitives.