diff --git a/cpu/cc430/periph/rtc.c b/cpu/cc430/periph/rtc.c
index f1efc891f3..2be809ea82 100644
--- a/cpu/cc430/periph/rtc.c
+++ b/cpu/cc430/periph/rtc.c
@@ -60,7 +60,7 @@ int rtc_set_time(struct tm *localt)
     }
 
     /* copy time to be set */
-    memcpy(&time_to_set, localt, sizeof(struct tm));
+    time_to_set = *localt;
     set_time = 1;
     return 0;
 }