diff --git a/jOOQ/src/main/java/org/jooq/impl/ResultImpl.java b/jOOQ/src/main/java/org/jooq/impl/ResultImpl.java
index 039715313a..ad458e999c 100644
--- a/jOOQ/src/main/java/org/jooq/impl/ResultImpl.java
+++ b/jOOQ/src/main/java/org/jooq/impl/ResultImpl.java
@@ -1313,7 +1313,7 @@ final class ResultImpl<R extends Record> implements Result<R>, AttachableInterna
 
         for (R record : this)
             if (map.put((K) record.get(kIndex), (V) record.get(vIndex)) != null)
-                throw new InvalidResultException("Key " + kIndex + " is not unique in Result for " + this);
+                throw new InvalidResultException("Key " + record.get(kIndex) + " is not unique in Result for " + this);
 
         return map;
     }