diff --git a/lib/spack/spack/concretize.py b/lib/spack/spack/concretize.py
index 0e7bf53b44..3434ca66f7 100644
--- a/lib/spack/spack/concretize.py
+++ b/lib/spack/spack/concretize.py
@@ -334,9 +334,9 @@ def concretize_compiler(self, spec):
         # Should think whether this can be more efficient
         def _proper_compiler_style(cspec, architecture):
             compilers = spack.compilers.compilers_for_spec(cspec)
-            if architecture.target.compiler_strategy == 'PATH':
+            if architecture.platform_os.compiler_strategy == 'PATH':
                 filter(lambda c: not c.modules, compilers)
-            if architecture.target.compiler_strategy == 'MODULES':
+            if architecture.platform_os.compiler_strategy == 'MODULES':
                 filter(lambda c: c.modules, compilers)
             return compilers