diff --git a/build/autoconf/lustre-build.m4 b/build/autoconf/lustre-build.m4
index c20ed73921021247b8424b33bff0ee28eff24eaa..e8a546b75e94fff72efa61e9ed3d1cb6d3044b28 100644
--- a/build/autoconf/lustre-build.m4
+++ b/build/autoconf/lustre-build.m4
@@ -36,7 +36,7 @@ case x$with_sysio in
 		;;
 	*)
 		AC_MSG_RESULT([$with_sysio])
-		AC_CHECK_FILE([$with_sysio/src/libsysio.a],[],[
+		AC_CHECK_FILE([$with_sysio/lib/libsysio.a],[],[
 			AC_MSG_ERROR([A complete (built) external libsysio was not found.])
 		])
 		SYSIO=$with_sysio