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-rw-r--r--cpukit/libnetworking/netinet/ip_var.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/cpukit/libnetworking/netinet/ip_var.h b/cpukit/libnetworking/netinet/ip_var.h
index 7d40243f24..75aeb94816 100644
--- a/cpukit/libnetworking/netinet/ip_var.h
+++ b/cpukit/libnetworking/netinet/ip_var.h
@@ -37,6 +37,10 @@
#ifndef _NETINET_IP_VAR_H_
#define _NETINET_IP_VAR_H_
+#ifndef BYTE_PACK
+#define BYTE_PACK __attribute__((packed))
+#endif
+
/*
* Overlay for ip header used by other protocols (tcp, udp).
*/