diff -r 41dc9a4a0f76 -r 5db725cc40f9 lib/slave_config.c
--- a/lib/slave_config.c	Tue Nov 20 14:53:36 2012 +0100
+++ b/lib/slave_config.c	Thu Nov 29 10:15:40 2012 +0100
@@ -306,8 +306,8 @@
 /*****************************************************************************/
 
 void ecrt_slave_config_dc(ec_slave_config_t *sc, uint16_t assign_activate,
-        uint32_t sync0_cycle_time, uint32_t sync0_shift_time,
-        uint32_t sync1_cycle_time, uint32_t sync1_shift_time)
+        uint32_t sync0_cycle_time, int32_t sync0_shift_time,
+        uint32_t sync1_cycle_time, int32_t sync1_shift_time)
 {
     ec_ioctl_config_t data;
     int ret;
@@ -321,7 +321,7 @@
 
     ret = ioctl(sc->master->fd, EC_IOCTL_SC_DC, &data);
     if (EC_IOCTL_IS_ERROR(ret)) {
-        fprintf(stderr, "Failed to set assign_activate word: %s\n",
+        fprintf(stderr, "Failed to set DC parameters: %s\n",
                 strerror(EC_IOCTL_ERRNO(ret)));
     }
 }