diff --git a/ptp4l.c b/ptp4l.c
index c41e642..aad970a 100644
--- a/ptp4l.c
+++ b/ptp4l.c
@@ -27,6 +27,7 @@
 #include "print.h"
 #include "sk.h"
 #include "transport.h"
+#include "util.h"
 
 int assume_two_step;
 double configured_pi_kp, configured_pi_ki; /*see pi.c*/
@@ -38,22 +39,6 @@ static struct defaultDS ds;
 static struct port_defaults pod;
 static struct config cfg_settings;
 
-static int generate_clock_identity(struct ClockIdentity *ci, char *name)
-{
-	unsigned char mac[6];
-	if (sk_interface_macaddr(name, mac, sizeof(mac)))
-		return -1;
-	ci->id[0] = mac[0];
-	ci->id[1] = mac[1];
-	ci->id[2] = mac[2];
-	ci->id[3] = 0xFF;
-	ci->id[4] = 0xFE;
-	ci->id[5] = mac[3];
-	ci->id[6] = mac[4];
-	ci->id[7] = mac[5];
-	return 0;
-}
-
 static void usage(char *progname)
 {
 	fprintf(stderr,
diff --git a/util.c b/util.c
index f597c49..4f432a6 100644
--- a/util.c
+++ b/util.c
@@ -18,6 +18,7 @@
  */
 #include <stdio.h>
 
+#include "sk.h"
 #include "util.h"
 
 char *ps_str[] = {
@@ -73,3 +74,19 @@ char *pid2str(struct PortIdentity *id)
 		 id->portNumber);
 	return buf;
 }
+
+int generate_clock_identity(struct ClockIdentity *ci, char *name)
+{
+	unsigned char mac[6];
+	if (sk_interface_macaddr(name, mac, sizeof(mac)))
+		return -1;
+	ci->id[0] = mac[0];
+	ci->id[1] = mac[1];
+	ci->id[2] = mac[2];
+	ci->id[3] = 0xFF;
+	ci->id[4] = 0xFE;
+	ci->id[5] = mac[3];
+	ci->id[6] = mac[4];
+	ci->id[7] = mac[5];
+	return 0;
+}
diff --git a/util.h b/util.h
index 50b9c7c..d538cce 100644
--- a/util.h
+++ b/util.h
@@ -54,4 +54,6 @@ char *cid2str(struct ClockIdentity *id);
  */
 char *pid2str(struct PortIdentity *id);
 
+int generate_clock_identity(struct ClockIdentity *ci, char *name);
+
 #endif