diff --git a/util/tlm/README b/util/tlm/README
index 3ae43c5909..1dbfe41ae7 100644
--- a/util/tlm/README
+++ b/util/tlm/README
@@ -93,13 +93,14 @@ without python.
 
 > cd ../..
 > scons build/ARM/gem5.opt
-> scons --with-cxx-config --without-python --without-tcmalloc USE_SYSTEMC=0 \
->       build/ARM/libgem5_opt.so
+> scons setconfig build/ARM USE_SYSTEMC=n
+> scons --with-cxx-config --without-python --without-tcmalloc \
+>       --duplicate-sources build/ARM/libgem5_opt.so
 > cd util/tlm
 
 Note: For MAC / OSX this command should be used:
-> scons --with-cxx-config --without-python --without-tcmalloc USE_SYSTEMC=0 \
->       build/ARM/libgem5_opt.dylib
+> scons --with-cxx-config --without-python --without-tcmalloc \
+>       --duplicate-sources build/ARM/libgem5_opt.dylib
 
 To build all sources of the SystemC binding and the examples simply run scons: