diff --git a/lib/core/agent.py b/lib/core/agent.py
index ca935849a..62cbe3764 100644
--- a/lib/core/agent.py
+++ b/lib/core/agent.py
@@ -592,7 +592,7 @@ class Agent:
 
         return inbandQuery
 
-    def limitQuery(self, num, query, field=None):
+    def limitQuery(self, num, query, field=None, uniqueField=None):
         """
         Take in input a query string and return its limited query string.
 
@@ -672,12 +672,12 @@ class Agent:
                 limitedQuery = limitedQuery.replace("SELECT ", (limitStr % 1), 1)
 
                 if " WHERE " in limitedQuery:
-                    limitedQuery = "%s AND %s " % (limitedQuery, field)
+                    limitedQuery = "%s AND %s " % (limitedQuery, field if not uniqueField else uniqueField)
                 else:
-                    limitedQuery = "%s WHERE %s " % (limitedQuery, field)
+                    limitedQuery = "%s WHERE %s " % (limitedQuery, field if not uniqueField else uniqueField)
 
                 limitedQuery += "NOT IN (%s" % (limitStr % num)
-                limitedQuery += "%s %s)" % (field, fromFrom)
+                limitedQuery += "%s %s)" % (field if not uniqueField else uniqueField, fromFrom)
 
         if orderBy:
             limitedQuery += orderBy
diff --git a/lib/techniques/error/use.py b/lib/techniques/error/use.py
index 7ecfa7a6b..0faff6165 100644
--- a/lib/techniques/error/use.py
+++ b/lib/techniques/error/use.py
@@ -81,7 +81,7 @@ def __errorFields(expression, expressionFields, expressionFieldsList, expected=N
 
         if isinstance(num, int):
             origExpr = expression
-            expression = agent.limitQuery(num, expression, field)
+            expression = agent.limitQuery(num, expression, field, expressionFieldsList[0])
 
         if "ROWNUM" in expressionFieldsList:
             expressionReplaced = expression