diff --git a/util/tlm/SConstruct b/util/tlm/SConstruct
index 695c5e3..f1e057d 100644
--- a/util/tlm/SConstruct
+++ b/util/tlm/SConstruct
@@ -78,6 +78,7 @@
 AddOption('--no-colors', dest='use_colors', action='store_false',
           help="Don't add color to abbreviated scons output")
 
+main.SConsignFile('build/systemc/sconsign')
 SConscript(gem5_root + '/ext/systemc/SConscript',
            variant_dir='build/systemc',
            exports='main')