diff --git a/lib/techniques/error/use.py b/lib/techniques/error/use.py
index 578ec0b92..c23a5c36a 100644
--- a/lib/techniques/error/use.py
+++ b/lib/techniques/error/use.py
@@ -125,8 +125,7 @@ def __errorFields(expression, expressionFields, expressionFieldsList, expected=N
         if output:
             output = output.replace(kb.misc.space, " ")
 
-        if output is not None:
-            outputs.append(output)
+        outputs.append(output)
 
     return outputs