diff --git a/lib/cdist/emulator.py b/lib/cdist/emulator.py
index ecdfff25..a97959e6 100644
--- a/lib/cdist/emulator.py
+++ b/lib/cdist/emulator.py
@@ -105,11 +105,11 @@ def emulator(argv):
                     sys.exit(1)
                 else:
                     param_fd = open(file, "r")
-                    param_old = param_fd.readlines()
+                    value_old = param_fd.readlines()
                     param_fd.close()
                     
-                    if(param_old != param):
-                        print("Parameter " + param + " differs: " + " ".join(param_old) + " vs. " + param)
+                    if(value_old != value):
+                        print("Parameter " + param + " differs: " + " ".join(value_old) + " vs. " + value)
                         print("Sources: " + " ".join(old_object_source) + " and " + object_source)
                         sys.exit(1)
             else: