icomplete-with-completion-tables

icomplete-with-completion-tables is a variable defined in `icomplete.el'.
Its value is

t

Documentation:
Specialized completion tables with which Icomplete should operate.
If this is t, Icomplete operates on all tables.
Otherwise this should be a list of the completion tables (e.g.,
`internal-complete-buffer') on which Icomplete should operate.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.