diff --git a/siphash.c b/siphash.c
index 7a5c8d4..d85fd4b 100644
--- a/siphash.c
+++ b/siphash.c
@@ -7,8 +7,6 @@
 // You should have received a copy of the CC0 Public Domain Dedication along
 // with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 
-#include "siphash.h"
-
 inline static uint64_t
 u8to64_le (const unsigned char *p)
 {
@@ -23,7 +21,7 @@ u8to64_le (const unsigned char *p)
 		(uint64_t) p[7] << 56 ;
 }
 
-uint64_t
+static uint64_t
 siphash (const unsigned char key[16], const unsigned char *m, size_t len)
 {
 	uint64_t v0, v1, v2, v3;
diff --git a/siphash.h b/siphash.h
deleted file mode 100644
index dca7c42..0000000
--- a/siphash.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef SIPHASH_H
-#define SIPHASH_H
-
-#include <stdint.h>
-#include <stdlib.h>
-
-uint64_t siphash (const unsigned char key[16],
-	const unsigned char *m, size_t len);
-
-#endif // SIPHASH_H