diff --git a/ptp4l.c b/ptp4l.c
index 9e04f0b..c41e642 100644
--- a/ptp4l.c
+++ b/ptp4l.c
@@ -29,7 +29,6 @@
 #include "transport.h"
 
 int assume_two_step;
-int sk_tx_retries = 2, sk_prefer_layer2 = 0; /*see sk.c*/
 double configured_pi_kp, configured_pi_ki; /*see pi.c*/
 extern unsigned char ptp_dst_mac[]; /*see raw.c*/
 extern unsigned char p2p_dst_mac[]; /*see raw.c*/
diff --git a/sk.c b/sk.c
index 577ace0..84cf11e 100644
--- a/sk.c
+++ b/sk.c
@@ -30,6 +30,10 @@
 #include "print.h"
 #include "sk.h"
 
+/* globals */
+
+int sk_tx_retries = 2, sk_prefer_layer2 = 0;
+
 /* private methods */
 
 static int hwts_init(int fd, char *device)