diff --git a/src/fsfw/pus/Service11TelecommandScheduling.tpp b/src/fsfw/pus/Service11TelecommandScheduling.tpp
index 1471e77ab..14d275cb0 100644
--- a/src/fsfw/pus/Service11TelecommandScheduling.tpp
+++ b/src/fsfw/pus/Service11TelecommandScheduling.tpp
@@ -167,7 +167,10 @@ inline ReturnValue_t Service11TelecommandScheduling<MAX_NUM_TCS>::doInsertActivi
   Clock::getClock_timeval(&tNow);
   timeval timeDifference = scheduledTime - tNow;
   // round subseconds up
-  if (timeDifference.tv_sec + 1 <= RELEASE_TIME_MARGIN_SECONDS) {
+  if (timeDifference.tv_usec != 0) {
+    timeDifference.tv_sec++;
+  }
+  if (timeDifference.tv_sec <= RELEASE_TIME_MARGIN_SECONDS) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
     sif::warning << "Service11TelecommandScheduling::doInsertActivity: Release time too close to "
                     "current time"