diff --git a/libowlps/libowlps.c b/libowlps/libowlps.c
index b1f3ae5..5d3a239 100644
--- a/libowlps/libowlps.c
+++ b/libowlps/libowlps.c
@@ -91,20 +91,10 @@ uint_fast8_t owl_frequency_to_channel(uint_fast16_t channel)
 
 
 /*
- * Set the TIMESTAMP 'now' at the current time (millisecond-precision).
+ * Sets the TIMESTAMP 'now' at the current time.
+ * Returns 0 in case of success non-zero otherwise.
  */
-void owl_timestamp_now(TIMESTAMP *now)
-{
-  if (! owl_timestamp_now_ns(now))
-    owl_timestamp_round_to_ms(now) ;
-}
-
-
-
-/*
- * Set the TIMESTAMP 'now' at the current time (nanosecond-precision).
- */
-int owl_timestamp_now_ns(TIMESTAMP *now)
+int owl_timestamp_now(TIMESTAMP *now)
 {
   int ret ;
   struct timespec now_ts ;
@@ -121,16 +111,6 @@ int owl_timestamp_now_ns(TIMESTAMP *now)
 
 
 
-/*
- * Lower the precision of 'now' to milliseconds.
- */
-void owl_timestamp_round_to_ms(TIMESTAMP *now)
-{
-  now->tv_nsec = now->tv_nsec / 1000000u * 1000000u ;
-}
-
-
-
 /*
  * Returns a TIMESTAMP from a struct timespec.
  */
diff --git a/libowlps/owlps.h b/libowlps/owlps.h
index c0944df..5404e2a 100644
--- a/libowlps/owlps.h
+++ b/libowlps/owlps.h
@@ -227,9 +227,7 @@ BOOL owl_mac_equals(uint8_t *mac1, uint8_t *mac2) ;
 uint_fast8_t owl_frequency_to_channel(uint_fast16_t channel) ;
 
 // Time
-void owl_timestamp_now(TIMESTAMP *now) ;
-int owl_timestamp_now_ns(TIMESTAMP *now) ;
-void owl_timestamp_round_to_ms(TIMESTAMP *now) ;
+int owl_timestamp_now(TIMESTAMP *now) ;
 TIMESTAMP owl_timespec_to_timestamp(const struct timespec d) ;
 TIMESTAMP owl_timeval_to_timestamp(const struct timeval d) ;
 uint64_t owl_timestamp_to_ms(TIMESTAMP date) ;