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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index f3603c17..3770b2fc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,7 +56,7 @@ AM_CONDITIONAL(HAVE_RST2MAN, [test "x$RST2MAN" = xyes])
# Checks for functions, headers, structures, etc.
AC_HEADER_STDC
-AC_CHECK_HEADERS([termios.h linux/kd.h sys/kd.h libgen.h])
+AC_CHECK_HEADERS([termios.h linux/kd.h sys/kd.h libgen.h sys/io.h])
AC_CHECK_MEMBERS([struct sysinfo.totalram],[],[],[AC_INCLUDES_DEFAULT
#include <sys/sysinfo.h>
])