diff --git a/lib/spack/spack/cmd/arch.py b/lib/spack/spack/cmd/arch.py
index aeb2ba3ff85..f0e88d1849b 100644
--- a/lib/spack/spack/cmd/arch.py
+++ b/lib/spack/spack/cmd/arch.py
@@ -28,8 +28,8 @@
 description = "Print the architecture for this machine"
 
 def arch(parser, args):
-    configured_sys_type = arch.get_sys_type_from_spack_globals()
+    configured_sys_type = architecture.get_sys_type_from_spack_globals()
     if not configured_sys_type:
         configured_sys_type = "autodetect"
     print "Configured sys_type:             %s" % configured_sys_type
-    print "Autodetected default sys_type:   %s" % arch.sys_type()
+    print "Autodetected default sys_type:   %s" % architecture.sys_type()