diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index a1c8dd9..a487c80 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -17,6 +17,7 @@
 #include <linux/inet.h>
 #include <linux/in.h>
 #include <linux/ip.h>
+#include <linux/slab.h>
 #include <linux/udp.h>
 #include <linux/tcp.h>
 #include <linux/skbuff.h>