diff --git a/examples/CMDTEST_gcc.rb b/examples/CMDTEST_gcc.rb
index 029725b..f2a13df 100644
--- a/examples/CMDTEST_gcc.rb
+++ b/examples/CMDTEST_gcc.rb
@@ -32,7 +32,7 @@ class CMDTEST_gcc < Cmdtest::Testcase
   end
 
   def gxx
-    ENV["CMDTEST_GXX_TO_TEST"] || "g++"
+    gcc.sub(/gcc$/, "g++")
   end
 
   #----------------------------------------