BASIC assembler bug?

I compiled my Teletext module, which is written in BASIC assembler, for the first time in 10 years yesterday to fix an unaligned read problem on a beagleboard. But it didn’t compile, it failed with ‘Missing ,’. The relevant line showed

STR back,[spscreen],#4

It turns out that it doesn’t like ‘spscreen’ as a variable name I think it reads the ‘sp’ and thinks it is the stack pointer so looks for a comma between ‘sp’ and ‘screen’.

I globally replaced ‘spscreen’ with ‘_spscreen’ and everything is ok.

Just thought I’d mention it as it obviously compiled 10 years ago.