--- a/acinclude.m4
+++ b/acinclude.m4
@@ -39,8 +39,8 @@
 		[$jk_inet_includes
 $jk_icmp_includes])
 
-AC_CHECK_MEMBERS([struct icmp.icmp_type, struct icmp.icmp_code,\
-struct icmp.icmp_cksum, struct icmp.icmp_seq,\
+AC_CHECK_MEMBERS([struct icmp.icmp_type, struct icmp.icmp_code,
+struct icmp.icmp_cksum, struct icmp.icmp_seq,
 struct icmp.icmp_id],[],
 		AC_MSG_ERROR(struct icmp not defined or not compatible),
 		[$jk_inet_includes