darwin13 also uses kernel_sysctl
diff --git a/agent/mibgroup/mibII/icmp.h b/agent/mibgroup/mibII/icmp.h
index 73533cf..d07841a 100644
--- a/agent/mibgroup/mibII/icmp.h
+++ b/agent/mibgroup/mibII/icmp.h
@@ -23,6 +23,7 @@
 config_arch_require(darwin10,  mibII/kernel_sysctl)
 config_arch_require(darwin11,  mibII/kernel_sysctl)
 config_arch_require(darwin12,  mibII/kernel_sysctl)
+config_arch_require(darwin13,  mibII/kernel_sysctl)
 
 #include <net-snmp/agent/cache_handler.h>