diff --git a/Makefile b/Makefile
index 8a8468e..ce40698 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,8 @@ all : $(PROGRAMS)
 install : $(PROGRAMS)
 	cp $^ $(HOME)/bin/
 
-dlight : dlight.o buffer.o env.o http.o rss.o lockfile.o filter.o cconf.o dlhist.o error.o
+dlight : dlight.o buffer.o env.o http.o rss.o lockfile.o filter.o cconf.o \
+	proc-cache.o error.o
 dlight-compile : compile.o buffer.o env.o lockfile.o filter.o cconf.o error.o
 dlight-read-config : read-config.o buffer.o env.o cconf.o error.o
 dlight-filter-check: filter-check.o filter.o error.o
diff --git a/dlight.c b/dlight.c
index d027db5..31c373e 100644
--- a/dlight.c
+++ b/dlight.c
@@ -9,12 +9,12 @@
 #include "env.h"
 #include "error.h"
 #include "cconf.h"
-#include "dlhist.h"
+#include "proc-cache.h"
 #include "filter.h"
 #include "http.h"
 #include "rss.h"
 
-#define DLHIST_PURGE_INTERVAL (60*60*6) /* 6 hours (in seconds) */
+#define PROC_CACHE_PURGE_INTERVAL (60*60*6) /* 6 hours (in seconds) */
 
 static int write_http_file(struct http_file *file, const char *dest) {
 
@@ -45,7 +45,7 @@ static void process_items(rss_t rss, struct target *t) {
 
 		struct http_file *file = NULL;
 
-		if (dlhist_lookup(item.link))
+		if (proc_cache_lookup(item.link))
 			continue;
 
 		for(i=0; i < t->nr; i++) {
@@ -70,7 +70,7 @@ static void process_items(rss_t rss, struct target *t) {
 			printf("Downloaded: %s (%s) to %s\n",
 				item.title, item.link, filter->dest);
 
-			dlhist_update(item.link);
+			proc_cache_update(item.link);
 		}
 
 		http_free_file(file);
@@ -82,7 +82,7 @@ static void process(struct cconf *config) {
 	int i;
 	struct buffer *data;
 
-	dlhist_purge(DLHIST_PURGE_INTERVAL);
+	proc_cache_purge(PROC_CACHE_PURGE_INTERVAL);
 
 	for(i=0; i < config->nr; i++) {
 		struct target *t = config->target + i;
@@ -118,12 +118,12 @@ int main(int argc, char *argv[]) {
 		return 1;
 	}
 
-	if (dlhist_open() < 0)
+	if (proc_cache_open() < 0)
 		return 1;
 
 	process(config);
 
-	dlhist_close();
+	proc_cache_close();
 	cconf_free(config);
 
 	return 0;
diff --git a/dlhist.c b/proc-cache.c
similarity index 93%
rename from dlhist.c
rename to proc-cache.c
index dcc0b2b..a899817 100644
--- a/dlhist.c
+++ b/proc-cache.c
@@ -1,4 +1,4 @@
-/* dlhist.c
+/* proc-cache.c
  *
  *   Copyright (C) 2011       Henrik Hautakoski <henrik@fiktivkod.org>
  *
@@ -29,11 +29,11 @@
 #include <time.h>
 #include "env.h"
 #include "lockfile.h"
-#include "dlhist.h"
+#include "proc-cache.h"
 
-/* \195 D L H */
-#define SIGNATURE 0xC3444C48
-#define STORAGE_FILE "dlhist"
+/* \175 D P C */
+#define SIGNATURE 0xAF445043
+#define STORAGE_FILE "proc-cache"
 
 #define TABLE_MIN_SIZE 128
 
@@ -191,7 +191,7 @@ static void build_table(const char *buf, size_t entries) {
 	}
 }
 
-int dlhist_open() {
+int proc_cache_open() {
 
 	char filename[4096], *buf = NULL;
 	int ret = -1, fd = -1;
@@ -209,7 +209,7 @@ int dlhist_open() {
 
 	fd = open(filename, O_CREAT | O_RDONLY, 0600);
 	if (fd < 0 || fstat(fd, &st) < 0) {
-		perror("dlhist_open");
+		perror("proc_cache_open");
 		goto error;
 	}
 
@@ -225,7 +225,7 @@ int dlhist_open() {
 		hdr = (struct header *) buf;
 		if (hdr->signature != htonl(SIGNATURE) ||
 			hdr->version != htonl(1)) {
-			fprintf(stderr, "dlhist_open: Invalid header\n");
+			fprintf(stderr, "proc_cache_open: Invalid header\n");
 			goto error;
 		}
 
@@ -236,7 +236,7 @@ int dlhist_open() {
 
 	if (entries * HE_SZ > st.st_size - offset) {
 		fprintf(stderr,
-			"dlhist_open: file truncated. "
+			"proc_cache_open: file truncated. "
 			"expected atleast '%lu' bytes, got '%lu'\n",
 			entries * HE_SZ, st.st_size - offset);
 		goto error;
@@ -255,7 +255,7 @@ error:
 	return ret;
 }
 
-int dlhist_lookup(const char *url) {
+int proc_cache_lookup(const char *url) {
 
 	if (table_size) {
 		struct hash_entry *he = lookup(url);
@@ -264,7 +264,7 @@ int dlhist_lookup(const char *url) {
 	return 0;
 }
 
-void dlhist_update(const char *url) {
+void proc_cache_update(const char *url) {
 
 	struct hash_entry *he;
 
@@ -283,7 +283,7 @@ void dlhist_update(const char *url) {
 	}
 }
 
-void dlhist_purge(unsigned int timestamp) {
+void proc_cache_purge(unsigned int timestamp) {
 
 	unsigned int i, t = 0, now = time(NULL);
 
@@ -301,7 +301,7 @@ void dlhist_purge(unsigned int timestamp) {
 	resize_table();
 }
 
-void dlhist_flush() {
+void proc_cache_flush() {
 
 	int i;
 	struct header hdr;
@@ -339,9 +339,9 @@ void dlhist_flush() {
 	commit_lock(&lock);
 }
 
-void dlhist_close() {
+void proc_cache_close() {
 
-	dlhist_flush();
+	proc_cache_flush();
 
 	release_lock(&lock);
 
diff --git a/dlhist.h b/proc-cache.h
similarity index 74%
rename from dlhist.h
rename to proc-cache.h
index 93161ea..0f608ea 100644
--- a/dlhist.h
+++ b/proc-cache.h
@@ -1,4 +1,4 @@
-/* dlhist.h
+/* proc-cache.h
  *
  *   Copyright (C) 2011       Henrik Hautakoski <henrik@fiktivkod.org>
  *
@@ -17,19 +17,19 @@
  *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  *   MA 02110-1301, USA.
  */
-#ifndef DLHIST_H
-#define DLHIST_H
+#ifndef PROC_CACHE_H
+#define PROC_CACHE_H
 
-int dlhist_open();
+int proc_cache_open();
 
-int dlhist_lookup(const char *url);
+int proc_cache_lookup(const char *url);
 
-void dlhist_update(const char *url);
+void proc_cache_update(const char *url);
 
-void dlhist_purge(unsigned int timestamp);
+void proc_cache_purge(unsigned int timestamp);
 
-void dlhist_flush();
+void proc_cache_flush();
 
-void dlhist_close();
+void proc_cache_close();
 
-#endif /* DLHIST */
\ No newline at end of file
+#endif /* PROC_CACHE_H */