diff --git a/orte/mca/ess/alps/configure.m4 b/orte/mca/ess/alps/configure.m4
index 59eea13da8..b21d53889f 100644
--- a/orte/mca/ess/alps/configure.m4
+++ b/orte/mca/ess/alps/configure.m4
@@ -54,7 +54,7 @@ AC_DEFUN([MCA_orte_ess_alps_CONFIG],[
         [orte_mca_ess_alps_happy="no"])
 
     AS_IF([test "$orte_mca_ess_alps_happy" = "yes" -a "$orte_without_full_support" = 0 -a
-	   "orte_mca_ess_alps_have_cnos" = 1],
+           "$orte_mca_ess_alps_have_cnos" = 1],
           [$1],
           [$2])
 ])dnl