I have a bunch of files that are secure_xxxxxx.php. Is there a way to use .htaccess to block access to all the secure_* php files based on IP?

EDIT: I've tried but I get 500 errors

<FilesMatch "^secure_.*\.php$">
order deny all
deny from all
allow from my ip here
</FilesMatch>

Don't see any errors in apache error logs either

httpd -M
Loaded Modules:
 core_module (static)
 authn_file_module (static)
 authn_default_module (static)
 authz_host_module (static)
 authz_groupfile_module (static)
 authz_user_module (static)
 authz_default_module (static)
 auth_basic_module (static)
 include_module (static)
 filter_module (static)
 log_config_module (static)
 logio_module (static)
 env_module (static)
 expires_module (static)
 headers_module (static)
 setenvif_module (static)
 version_module (static)
 proxy_module (static)
 proxy_connect_module (static)
 proxy_ftp_module (static)
 proxy_http_module (static)
 proxy_scgi_module (static)
 proxy_ajp_module (static)
 proxy_balancer_module (static)
 ssl_module (static)
 mpm_prefork_module (static)
 http_module (static)
 mime_module (static)
 dav_module (static)
 status_module (static)
 autoindex_module (static)
 asis_module (static)
 info_module (static)
 suexec_module (static)
 cgi_module (static)
 dav_fs_module (static)
 negotiation_module (static)
 dir_module (static)
 actions_module (static)
 userdir_module (static)
 alias_module (static)
 rewrite_module (static)
 so_module (static)
 fastinclude_module (shared)
 auth_passthrough_module (shared)
 bwlimited_module (shared)
 frontpage_module (shared)
 suphp_module (shared)
Syntax OK