diff --git a/cache.h b/cache.h
index 0dcd2fe53b..f0c9b01aa3 100644
--- a/cache.h
+++ b/cache.h
@@ -327,7 +327,7 @@ extern int get_ack(int fd, unsigned char *result_sha1);
 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match);
 
 extern struct packed_git *parse_pack_index(unsigned char *sha1);
-extern struct packed_git *parse_pack_index_file(unsigned char *sha1, 
+extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
 						char *idx_path);
 
 extern void prepare_packed_git(void);
diff --git a/local-pull.c b/local-pull.c
index 8b16f50e33..ca0003ba2a 100644
--- a/local-pull.c
+++ b/local-pull.c
@@ -17,7 +17,7 @@ void prefetch(unsigned char *sha1)
 
 static struct packed_git *packs = NULL;
 
-void setup_index(unsigned char *sha1)
+static void setup_index(unsigned char *sha1)
 {
 	struct packed_git *new_pack;
 	char filename[PATH_MAX];
@@ -30,7 +30,7 @@ void setup_index(unsigned char *sha1)
 	packs = new_pack;
 }
 
-int setup_indices()
+static int setup_indices(void)
 {
 	DIR *dir;
 	struct dirent *de;
@@ -49,7 +49,7 @@ int setup_indices()
 	return 0;
 }
 
-int copy_file(const char *source, const char *dest, const char *hex)
+static int copy_file(const char *source, const char *dest, const char *hex)
 {
 	if (use_link) {
 		if (!link(source, dest)) {
@@ -97,7 +97,7 @@ int copy_file(const char *source, const char *dest, const char *hex)
 	return -1;
 }
 
-int fetch_pack(unsigned char *sha1)
+static int fetch_pack(const unsigned char *sha1)
 {
 	struct packed_git *target;
 	char filename[PATH_MAX];
@@ -125,7 +125,7 @@ int fetch_pack(unsigned char *sha1)
 	return 0;
 }
 
-int fetch_file(unsigned char *sha1)
+static int fetch_file(const unsigned char *sha1)
 {
 	static int object_name_start = -1;
 	static char filename[PATH_MAX];
diff --git a/sha1_file.c b/sha1_file.c
index fa37f1e3ef..64eac592bb 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -487,7 +487,7 @@ struct packed_git *parse_pack_index(unsigned char *sha1)
 	return parse_pack_index_file(sha1, path);
 }
 
-struct packed_git *parse_pack_index_file(unsigned char *sha1, char *idx_path)
+struct packed_git *parse_pack_index_file(const unsigned char *sha1, char *idx_path)
 {
 	struct packed_git *p;
 	unsigned long idx_size;