401k RMD deferral

I deferred a first time 401k RMD for 2018 into 2019.  I also took the 2019 401k RMD in 2019 as required.  The 1099-R that I received for that account lumped the two RMDs together.   Will the IRS figure out that the 1099-R is actually two RMD's or will they be looking for the 2018 RMD separated from the 2019 RMD on the 2019 Return?