Tlc5940.cpp:62: multiple definition of `__vector_13'

C:\DOCUME~1\greg\LOCALS~1\Temp\build891807187282257886.tmp\Tlc5940\Tlc5940.cpp.o: In function __vector_13': C:\Program Files\Arduino\libraries\Tlc5940/Tlc5940.cpp:62: multiple definition of __vector_13’
C:\DOCUME~1\greg\LOCALS~1\Temp\build891807187282257886.tmp\Timer1\TimerOne.cpp.o:C:\Program Files\Arduino\libraries\Timer1/TimerOne.cpp:44: first defined here
collect2.exe: error: ld returned 1 exit status
Error compiling.

How do I get around this compile error?

It is caused by having both of these in the .ino file

#include <TimerOne.h>
#include <RealTimeClockDS1307.h>

But I need both of them

But I need both of them

How many places do you think timer 1 can be used AT A TIME?