diff --git a/master.cfg b/master.cfg
index 10d0b5b..1b047c1 100644
--- a/master.cfg
+++ b/master.cfg
@@ -956,7 +956,7 @@ The parameters of the class are:
             self.extra_conf_flags.append ('--enable-targets=all')
 
         if self.use_system_debuginfo:
-            self.extra_conf_flags.append ('--with-separate-debug-dir=%s' % system_debuginfo_location)
+            self.extra_conf_flags.append ('--with-separate-debug-dir=%s' % self.system_debuginfo_location)
 
         self.addStep (self.ConfigureClass (self.extra_conf_flags + architecture_triplet,
                                            haltOnFailure = True))