diff --git a/src/include/function/null/null_function_executor.h b/src/include/function/null/null_function_executor.h
index 008ed41c2f..37f87a5449 100644
--- a/src/include/function/null/null_function_executor.h
+++ b/src/include/function/null/null_function_executor.h
@@ -13,8 +13,9 @@ struct NullOperationExecutor {
         auto resultValues = (uint8_t*)result.getData();
         if (operand.state->isFlat()) {
             auto pos = operand.state->selVector->selectedPositions[0];
+            auto resultPos = result.state->selVector->selectedPositions[0];
             FUNC::operation(
-                operand.getValue<uint8_t>(pos), (bool)operand.isNull(pos), resultValues[pos]);
+                operand.getValue<uint8_t>(pos), (bool)operand.isNull(pos), resultValues[resultPos]);
         } else {
             if (operand.state->selVector->isUnfiltered()) {
                 for (auto i = 0u; i < operand.state->selVector->selectedSize; i++) {
diff --git a/test/test_files/tinysnb/function/null.test b/test/test_files/tinysnb/function/null.test
index 28e7068c1f..8f68b4fcd8 100644
--- a/test/test_files/tinysnb/function/null.test
+++ b/test/test_files/tinysnb/function/null.test
@@ -1,9 +1,16 @@
 -GROUP TinySnbReadTest
--DATASET CSV EMPTY
+-DATASET CSV tinysnb
 
 --
 
 -CASE NullTest
+
+-STATEMENT MATCH (a)-[:knows]->(b:person) WHERE a.ID = 2 RETURN a.ID, a.name, a.name IS NULL;
+---- 3
+2||True
+2||True
+2||True
+
 -STATEMENT RETURN NULL IS NULL
 ---- 1
 True