diff --git a/pcap-linux.c b/pcap-linux.c
index 70068b5..d1d2335 100644
--- a/pcap-linux.c
+++ b/pcap-linux.c
@@ -2389,6 +2389,9 @@ static void map_arphrd_to_dlt(pcap_t *handle, int arptype, int cooked_ok)
 		/* FALLTHROUGH */
 
 	case ARPHRD_METRICOM:
+#ifndef ARPHRD_LOOPBACK
+#define ARPHRD_LOOPBACK 772
+#endif
 	case ARPHRD_LOOPBACK:
 		handle->linktype = DLT_EN10MB;
 		handle->offset = 2;
@@ -2409,6 +2412,7 @@ static void map_arphrd_to_dlt(pcap_t *handle, int arptype, int cooked_ok)
 	case ARPHRD_CHAOS:
 		handle->linktype = DLT_CHAOS;
 		break;
+
 #ifndef ARPHRD_CAN
 #define ARPHRD_CAN 280
 #endif
@@ -2437,7 +2441,7 @@ static void map_arphrd_to_dlt(pcap_t *handle, int arptype, int cooked_ok)
 		handle->offset = 3;
 		break;
 
-#ifndef ARPHRD_ATM  /* FIXME: How to #include this? */
+#ifndef ARPHRD_ATM  /* FIXME: How to #include this? Values: 16, 19, 21 */
 #define ARPHRD_ATM 19
 #endif
 	case ARPHRD_ATM:
@@ -2504,6 +2508,9 @@ static void map_arphrd_to_dlt(pcap_t *handle, int arptype, int cooked_ok)
 		handle->linktype = DLT_IEEE802_11_RADIO;
 		break;
 
+#ifndef ARPHRD_PPP
+#define ARPHRD_PPP 512
+#endif
 	case ARPHRD_PPP:
 		/*
 		 * Some PPP code in the kernel supplies no link-layer
@@ -2561,10 +2568,25 @@ static void map_arphrd_to_dlt(pcap_t *handle, int arptype, int cooked_ok)
 #define ARPHRD_SIT 776	/* From Linux 2.2.13 */
 #endif
 	case ARPHRD_SIT:
+#ifndef ARPHRD_CSLIP
+#define ARPHRD_CSLIP 257
+#endif
 	case ARPHRD_CSLIP:
+#ifndef ARPHRD_SLIP6
+#define ARPHRD_SLIP6 258
+#endif
 	case ARPHRD_SLIP6:
+#ifndef ARPHRD_CSLIP6
+#define ARPHRD_CSLIP6 259
+#endif
 	case ARPHRD_CSLIP6:
+#ifndef ARPHRD_ADAPT
+#define ARPHRD_ADAPT 264
+#endif
 	case ARPHRD_ADAPT:
+#ifndef ARPHRD_SLIP
+#define ARPHRD_SLIP 256
+#endif
 	case ARPHRD_SLIP:
 #ifndef ARPHRD_RAWHDLC
 #define ARPHRD_RAWHDLC 518
@@ -2588,6 +2610,9 @@ static void map_arphrd_to_dlt(pcap_t *handle, int arptype, int cooked_ok)
 		handle->linktype = DLT_FRELAY;
 		break;
 
+#ifndef ARPHRD_LOCALTLK
+#define ARPHRD_LOCALTLK 773	/* IANA defines this as 11 */
+#endif
 	case ARPHRD_LOCALTLK:
 		handle->linktype = DLT_LTALK;
 		break;