diff --git a/configure.ac b/configure.ac
index 3b695d3..633ba81 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,9 @@ AC_CHECK_DECL(PF_CAN,,
 AC_CHECK_DECL(AF_CAN,,
     [AC_DEFINE([AF_CAN], [PF_CAN], [AF_CAN])]
 )
+AC_CHECK_DECL(N_SLCAN,,
+    [AC_DEFINE([N_SLCAN], [17], [N_SLCAN])]
+)
 
 
 #