Regular expression does not work with replace part of "Global search and replace" with regular expression.

For example,
if I use global search and replace with regular expression selected and Search for:
(if|for) (
And try to replace it with:
\1(
I actually get "\1(". It does not replace the \1 with the if or for from the regexp.

This works as expected when using search and replace locally within a file.
Then a line containing:
if (booleanValue) {
would be replace with
if(booleanValue)