diff --git a/Makefile.rule b/Makefile.rule
index 25ed0357d..8c651412e 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -107,13 +107,13 @@ BUILD_LAPACK_DEPRECATED = 1
 # BUILD_RELAPACK = 1
 
 # If you want to use legacy threaded Level 3 implementation.
-USE_SIMPLE_THREADED_LEVEL3 = 1
+# USE_SIMPLE_THREADED_LEVEL3 = 1
 
 # If you want to use the new, still somewhat experimental code that uses
 # thread-local storage instead of a central memory buffer in memory.c
 # Note that if your system uses GLIBC, it needs to have at least glibc 2.21
 # for this to work.
-USE_TLS = 1
+# USE_TLS = 1
 
 # If you want to drive whole 64bit region by BLAS. Not all Fortran
 # compiler supports this. It's safe to keep comment it out if you