diff --git a/test/lit.cfg b/test/lit.cfg
index 7eac5c69759..1965615ae81 100644
--- a/test/lit.cfg
+++ b/test/lit.cfg
@@ -76,6 +76,7 @@ for line in open(os.path.join(config.llvm_obj_root, 'test', 'site.exp')):
         site_exp[m.group(1)] = m.group(2)
 
 # Add substitutions.
+config.substitutions.append(('%llvmgcc_only', site_exp['llvmgcc']))
 for sub in ['llvmgcc', 'llvmgxx', 'compile_cxx', 'compile_c',
             'link', 'shlibext', 'ocamlopt', 'llvmdsymutil', 'llvmlibsdir',
             'bugpoint_topts']: