diff --git a/configure.ac b/configure.ac
index c5609355f..359d60092 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,7 +78,7 @@ fi
 AC_HEADER_STDC
 AC_HEADER_TIME
 
-AC_CHECK_FUNCS([lrintf strlcpy daemon dirname basename strcasecmp localtime_r posix_fallocate memmem strtold syslog])
+AC_CHECK_FUNCS([pread pwrite lrintf strlcpy daemon dirname basename strcasecmp localtime_r posix_fallocate memmem strtold syslog])
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 ACX_PTHREAD