diff --git a/src/common/options.h b/src/common/options.h
--- a/src/common/options.h
+++ b/src/common/options.h
@@ -17,3 +17,9 @@
   along with distren.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#ifndef _DISTREN_OPTIONS_H
+#define _DISTREN_OPTIONS_H
+
+int genericfunc();
+
+#endif