Filter for filetype and exact words

AFAIK there is no way to filter for filetypes in csearch. grep tool provides this with `--include` flag.

Headers only search
`grep --include="*.h" -w SEARCH_EXACT_WORD`

This feature might already be present in csearch tool, but I see it fails. I would like to search for exact words in header files alone.
I tried this
`csearch '\'` but this fails.

As workaround
`csearch SEARCH_EXACT_WORD | grep '\.h' | grep -w SEARCH_EXACT_WORD`