diff --git a/src/libstrongswan/utils/chunk.c b/src/libstrongswan/utils/chunk.c
index 919b695785..ac19fafb43 100644
--- a/src/libstrongswan/utils/chunk.c
+++ b/src/libstrongswan/utils/chunk.c
@@ -930,7 +930,7 @@ uint64_t chunk_mac(chunk_t chunk, u_char *key)
 /**
  * Secret key allocated randomly with chunk_hash_seed().
  */
-static u_char key[16] = {};
+static u_char hash_key[16] = {};
 
 /**
  * Static key used in case predictable hash values are required.
@@ -957,9 +957,9 @@ void chunk_hash_seed()
 	fd = open("/dev/urandom", O_RDONLY);
 	if (fd >= 0)
 	{
-		while (done < sizeof(key))
+		while (done < sizeof(hash_key))
 		{
-			len = read(fd, key + done, sizeof(key) - done);
+			len = read(fd, hash_key + done, sizeof(hash_key) - done);
 			if (len < 0)
 			{
 				break;
@@ -969,12 +969,12 @@ void chunk_hash_seed()
 		close(fd);
 	}
 	/* on error we use random() to generate the key (better than nothing) */
-	if (done < sizeof(key))
+	if (done < sizeof(hash_key))
 	{
 		srandom(time(NULL) + getpid());
-		for (; done < sizeof(key); done++)
+		for (; done < sizeof(hash_key); done++)
 		{
-			key[done] = (u_char)random();
+			hash_key[done] = (u_char)random();
 		}
 	}
 	seeded = TRUE;
@@ -986,7 +986,7 @@ void chunk_hash_seed()
 uint32_t chunk_hash_inc(chunk_t chunk, uint32_t hash)
 {
 	/* we could use a mac of the previous hash, but this is faster */
-	return chunk_mac_inc(chunk, key, ((uint64_t)hash) << 32 | hash);
+	return chunk_mac_inc(chunk, hash_key, ((uint64_t)hash) << 32 | hash);
 }
 
 /**
@@ -994,7 +994,7 @@ uint32_t chunk_hash_inc(chunk_t chunk, uint32_t hash)
  */
 uint32_t chunk_hash(chunk_t chunk)
 {
-	return chunk_mac(chunk, key);
+	return chunk_mac(chunk, hash_key);
 }
 
 /**