diff --git a/include/core/common/time_stamp.h b/include/core/common/time_stamp.h
index 7e17ac4f9e1b44337923c8f19230b11fe2f76ea3..2643f13c8f9629dce921726d6dfacf3171c3417f 100644
--- a/include/core/common/time_stamp.h
+++ b/include/core/common/time_stamp.h
@@ -290,8 +290,6 @@ inline double TimeStamp::operator -(const TimeStamp& ts) const
     return double((long int)(time_stamp_nano_ - ts.time_stamp_nano_))*1e-9; // long int cast fix overflow in case of negative substraction result
 }
 
-//static const TimeStamp TimeStampInvalid() {return TimeStamp(-1.0);}
-
 } // namespace wolf
 
 #endif