diff --git a/jOOQ/src/main/java/org/jooq/impl/JoinTable.java b/jOOQ/src/main/java/org/jooq/impl/JoinTable.java
index 804c2eb0c2..45d45cfda2 100755
--- a/jOOQ/src/main/java/org/jooq/impl/JoinTable.java
+++ b/jOOQ/src/main/java/org/jooq/impl/JoinTable.java
@@ -736,9 +736,9 @@ implements
             return onKey((ForeignKey<?, ?>) rightToLeft.get(0), rhs, lhs);
 
         if (rightToLeft.isEmpty() && leftToRight.isEmpty())
-            throw onKeyException(OnKeyExceptionReason.NOT_FOUND, leftToRight, rightToLeft);
+            throw onKeyException(OnKeyExceptionReason.NOT_FOUND, null, null);
         else
-            throw onKeyException(OnKeyExceptionReason.AMBIGUOUS, null, null);
+            throw onKeyException(OnKeyExceptionReason.AMBIGUOUS, leftToRight, rightToLeft);
     }
 
     @Override