diff --git a/src/fsfw/globalfunctions/TimeSystems.h b/src/fsfw/globalfunctions/TimeSystems.h
index bb03ebd3..533dc5cb 100644
--- a/src/fsfw/globalfunctions/TimeSystems.h
+++ b/src/fsfw/globalfunctions/TimeSystems.h
@@ -12,8 +12,7 @@ class TimeSystems {
   virtual ~TimeSystems() {}
 
   static double convertUnixToJD2000(timeval time) {
-    // time = {{s},{us}}
-    return (time.tv_sec / 86400.0) + 2440587.5 - 2451545;
+    return ((time.tv_sec + time.tv_usec * 1e-6) / 86400.0) + 2440587.5 - 2451545;
   }
 };