diff --git a/primitives/primproc/batchprimitiveprocessor.cpp b/primitives/primproc/batchprimitiveprocessor.cpp
index eb38f95fa..1942715e8 100644
--- a/primitives/primproc/batchprimitiveprocessor.cpp
+++ b/primitives/primproc/batchprimitiveprocessor.cpp
@@ -1195,7 +1195,7 @@ void BatchPrimitiveProcessor::executeTupleJoin()
                  */
 
                 if (((!found || isNull) && !(joinTypes[j] & (LARGEOUTER | ANTI))) ||
-                        ((joinTypes[j] & ANTI) && ((isNull && !(joinTypes[j] & MATCHNULLS)) || (found && !isNull))))
+                        ((joinTypes[j] & ANTI) && ((isNull && (joinTypes[j] & MATCHNULLS)) || (found && !isNull))))
                 {
                     //cout << " - not in the result set\n";
                     break;