diff --git a/libowlps/libowlps.c b/libowlps/libowlps.c
index b75f005..3d8bfbf 100644
--- a/libowlps/libowlps.c
+++ b/libowlps/libowlps.c
@@ -132,6 +132,40 @@ uint_fast8_t owl_frequency_to_channel(const uint_fast16_t channel)
 /* *** Time *** */
 
 
+/*
+ * Sleeps for a given amount of milliseconds.
+ * 'time_ms' is an unsigned value, so please be careful: passing a
+ * negative value may not do what you think.
+ * In case of error, a message is displayed and a non-zero error code
+ * is returned.
+ */
+int owl_msleep(uint32_t time_ms)
+{
+  int ret ;
+  uint_fast32_t seconds, microseconds ;
+
+  if (! time_ms)
+    return 0 ;
+
+  seconds = time_ms / 1000 ;
+  microseconds = time_ms % 1000 * 1000 ;
+
+  if ((ret = sleep(seconds)))
+    {
+      perror("Cannot sleep()") ;
+      return ret ;
+    }
+
+  if ((ret = usleep(microseconds)))
+    {
+      perror("Cannot usleep()") ;
+      return ret ;
+    }
+
+  return 0 ;
+}
+
+
 /*
  * Sets the owl_timestamp 'now' at the current time.
  * Returns 0 in case of success non-zero otherwise.
diff --git a/libowlps/owlps.h b/libowlps/owlps.h
index 7a90c61..78a8f90 100644
--- a/libowlps/owlps.h
+++ b/libowlps/owlps.h
@@ -187,6 +187,7 @@ owl_bool owl_mac_equals(const uint8_t *const mac1,
 uint_fast8_t owl_frequency_to_channel(const uint_fast16_t channel) ;
 
 // Time
+int owl_msleep(uint32_t time_ms) ;
 int owl_timestamp_now(owl_timestamp *const now) ;
 owl_timestamp owl_timespec_to_timestamp(const struct timespec d) ;
 owl_timestamp owl_timeval_to_timestamp(const struct timeval d) ;