diff --git a/src/lib/dlt_user.c b/src/lib/dlt_user.c
index 4ade95bf..7c1131c5 100644
--- a/src/lib/dlt_user.c
+++ b/src/lib/dlt_user.c
@@ -5230,8 +5230,13 @@ int dlt_start_threads()
         * even if we missed the signal
          */
         clock_gettime(CLOCK_MONOTONIC, &now);
-        single_wait.tv_sec = now.tv_sec;
-        single_wait.tv_nsec = now.tv_nsec + 500000000;
+        if (now.tv_nsec >= 500000000) {
+            single_wait.tv_sec = now.tv_sec + 1;
+            single_wait.tv_nsec = now.tv_nsec - 500000000;
+        } else {
+            single_wait.tv_sec = now.tv_sec;
+            single_wait.tv_nsec = now.tv_nsec + 500000000;
+        }
 
         // pthread_cond_timedwait has to be called on a locked mutex
         pthread_mutex_lock(&dlt_housekeeper_running_mutex);