diff --git a/configure.in b/configure.in
index 6d776596..fddfb87b 100644
--- a/configure.in
+++ b/configure.in
@@ -39,6 +39,9 @@ AM_PROG_AS
 AC_PROG_CXX
 AC_PROG_MAKE_SET
 
+AC_SYS_LARGEFILE
+AC_FUNC_FSEEKO
+
 AC_CHECK_TYPES(socklen_t, [], [])
 
 dnl check for getopt in standard library
@@ -169,7 +172,7 @@ AM_ICONV
 AM_LANGINFO_CODESET
 
 AC_ARG_ENABLE(doxygen_docs, AC_HELP_STRING([--disable-doxygen-docs], [Disable API documentation building via Doxygen]))
-if [ "x$enable_doxygen_docs" != "xno" ] ; then
+if test "x$enable_doxygen_docs" != "xno" ; then
 	AC_CHECK_PROGS(DOXYGEN, doxygen)
 fi
 AM_CONDITIONAL(FLaC__HAS_DOXYGEN, test -n "$DOXYGEN")