diff -uNr libpcap-0.8.1-pfring/pcap-linux.c libpcap-0.8.1-pfring-version/pcap-linux.c
--- libpcap-0.8.1-pfring/pcap-linux.c	2004-04-26 17:51:34.000000000 +0200
+++ libpcap-0.8.1-pfring-version/pcap-linux.c	2004-04-27 12:25:42.000000000 +0200
@@ -309,6 +309,12 @@
 	    }
 
 	    handle->slots_info = (FlowSlotInfo *)handle->ring_buffer;
+	    if(handle->slots_info->version != RING_FLOWSLOT_VERSION) {
+	      snprintf(ebuf, PCAP_ERRBUF_SIZE, "Wrong RING version: "
+		      "kernel is %i, libpcap was compiled with %i\n",
+		      handle->slots_info->version, RING_FLOWSLOT_VERSION);
+	      return (NULL);
+	    }
 	    memSlotsLen = handle->slots_info->tot_num_pages*PAGE_SIZE;
 	    munmap(handle->ring_buffer, PAGE_SIZE);