Issue compiling altcoin that starts with digit 1

my altcoin name is 1A and when I try to execute ./autogen.sh
it shows the following error:

./autogen.sh 
configure.ac:1359: error: AC_SUBST: `1A_DAEMON_NAME' is not a valid shell variable name
configure.ac:1359: the top level
autom4te: /usr/bin/m4 failed with exit status: 1
aclocal: error: echo failed with exit status: 1
autoreconf: aclocal failed with exit status: 1

How to solve that?