diff --git a/ChangeLog b/ChangeLog
index 6bdfa98..790cf12 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2014-02-05  NIIBE Yutaka  <gniibe@fsij.org>
+
+	* src/sha256.c (initial_state): Don't export, it's internal.
+
 2014-01-28  Niibe Yutaka  <gniibe@fsij.org>
 
 	* src/muladd_256.h: New.
diff --git a/src/sha256.c b/src/sha256.c
index 876ef1b..c948018 100644
--- a/src/sha256.c
+++ b/src/sha256.c
@@ -197,7 +197,7 @@ sha256_finish (sha256_context *ctx, unsigned char output[32])
   memset (ctx, 0, sizeof (sha256_context));
 }
 
-const uint32_t initial_state[8] =
+static const uint32_t initial_state[8] =
 {
   0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
   0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19