--- audex-0.74b1.orig/utils/hashlist.cpp
+++ audex-0.74b1/utils/hashlist.cpp
@@ -15,7 +15,8 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
- 
+
+#include <unistd.h>
 #include "hashlist.h"
 
 Hashlist::Hashlist() {