--- a/configure.ac
+++ b/configure.ac
@@ -162,6 +162,11 @@
      UNIXONLY=""
      funcstocheck=""
      ;;
+gnu*)
+     AC_DEFINE_UNQUOTED(GNU,1,[This is a GNU system])
+     build_target="gnu"
+     UNIXONLY="#"
+     ;;
 *)
      AC_MSG_RESULT(Unrecognised OS $host_os)
      AC_DEFINE_UNQUOTED(OTHEROS,1,[Some strange OS])
@@ -184,6 +189,7 @@
 AM_CONDITIONAL(XFREEBSD, test "$build_target" = "freebsd")
 AM_CONDITIONAL(OPENBSD, test "$build_target" = "openbsd")
 AM_CONDITIONAL(LINUX, test "$build_target" = "linux")
+AM_CONDITIONAL(GNU, test "$build_target" = "gnu")
 
 AC_MSG_RESULT([$build_target])
 AC_SUBST(build_target)
--- a/src/include/platform.h
+++ b/src/include/platform.h
@@ -146,7 +146,7 @@
 #include <semaphore.h>
 #include <net/if.h>
 #endif
-#ifdef LINUX
+#if defined(LINUX) || defined(GNU)
 #include <net/if.h>
 #endif
 #ifdef SOLARIS
--- a/src/util/disk.c
+++ b/src/util/disk.c
@@ -47,7 +47,7 @@
 
 
 
-#if defined(LINUX) || defined(CYGWIN)
+#if defined(LINUX) || defined(CYGWIN) || defined(GNU)
 #include <sys/vfs.h>
 #else
 #if defined(SOMEBSD) || defined(DARWIN)