[DAHDI] build dahdi driver only if dahdi header is present
diff --git a/openbsc/src/input/dahdi.c b/openbsc/src/input/dahdi.c
index 8f6bdda..2615557 100644
--- a/openbsc/src/input/dahdi.c
+++ b/openbsc/src/input/dahdi.c
@@ -22,6 +22,10 @@
  *
  */
 
+#include "../../bscconfig.h"
+
+#ifdef HAVE_DAHDI_USER_H
+
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
@@ -444,3 +448,5 @@
 	/* register the driver with the core */
 	e1inp_driver_register(&dahdi_driver);
 }
+
+#endif /* HAVE_DAHDI_USER_H */