diff --git a/master/fsm_master.c b/master/fsm_master.c
index a60b4dc9..4132f2a0 100644
--- a/master/fsm_master.c
+++ b/master/fsm_master.c
@@ -1001,7 +1001,7 @@ void ec_fsm_master_state_dc_read_offset(
 	   and the app_time set time */
 #ifdef EC_HAVE_CYCLES
 	correction =
-			(datagram->cycles_sent - slave->master->dc_cycles_app_time)
+            (datagram->cycles_sent - slave->master->dc_cycles_app_start_time)
 			* 1000000LL;
 	do_div(correction,cpu_khz);
 #else
diff --git a/master/master.c b/master/master.c
index 11b814d5..c6f25145 100644
--- a/master/master.c
+++ b/master/master.c
@@ -150,9 +150,9 @@ int ec_master_init(ec_master_t *master, /**< EtherCAT master */
 
     master->app_time = 0ULL;
 #ifdef EC_HAVE_CYCLES
-    master->dc_cycles_app_time = 0;
+    master->dc_cycles_app_start_time = 0;
 #endif
-    master->dc_jiffies_app_time = 0;
+    master->dc_jiffies_app_start_time = 0;
     master->app_start_time = 0ULL;
     master->has_app_time = 0;
 
@@ -2381,9 +2381,9 @@ void ecrt_master_application_time(ec_master_t *master, uint64_t app_time)
 		EC_MASTER_DBG(master, 1, "set application start time = %llu\n",app_time);
 		master->app_start_time = app_time;
 #ifdef EC_HAVE_CYCLES
-    master->dc_cycles_app_time = get_cycles();
+    master->dc_cycles_app_start_time = get_cycles();
 #endif
-    master->dc_jiffies_app_time = jiffies;
+    master->dc_jiffies_app_start_time = jiffies;
         master->has_app_time = 1;
     }
 }
diff --git a/master/master.h b/master/master.h
index ada84b51..e98bc86a 100644
--- a/master/master.h
+++ b/master/master.h
@@ -188,9 +188,9 @@ struct ec_master {
                                        monitoring. */
     ec_slave_t *dc_ref_clock; /**< DC reference clock slave. */
 #ifdef EC_HAVE_CYCLES
-    cycles_t dc_cycles_app_time; /** cycles at last ecrt_master_sync() call.*/
+    cycles_t dc_cycles_app_start_time; /** cycles at last ecrt_master_sync() call.*/
 #endif
-    unsigned long dc_jiffies_app_time;/** jiffies at last
+    unsigned long dc_jiffies_app_start_time;/** jiffies at last
                                             ecrt_master_sync() call.*/
     unsigned int scan_busy; /**< Current scan state. */
     unsigned int allow_scan; /**< \a True, if slave scanning is allowed. */