diff --git a/src/expression_evaluator/reference_evaluator.cpp b/src/expression_evaluator/reference_evaluator.cpp
index 80ab8267a1..0053188144 100644
--- a/src/expression_evaluator/reference_evaluator.cpp
+++ b/src/expression_evaluator/reference_evaluator.cpp
@@ -13,15 +13,16 @@ inline static bool isTrue(ValueVector& vector, uint64_t pos) {
 
 bool ReferenceExpressionEvaluator::selectInternal(SelectionVector& selVector) {
     uint64_t numSelectedValues = 0;
-    auto selectedBuffer = resultVector->state->getSelVectorUnsafe().getMutableBuffer();
-    if (resultVector->state->getSelVector().isUnfiltered()) {
-        for (auto i = 0u; i < resultVector->state->getSelVector().getSelSize(); i++) {
+    auto selectedBuffer = selVector.getMutableBuffer();
+    auto& resultSelVector = resultVector->state->getSelVector();
+    if (resultSelVector.isUnfiltered()) {
+        for (auto i = 0u; i < resultSelVector.getSelSize(); i++) {
             selectedBuffer[numSelectedValues] = i;
             numSelectedValues += isTrue(*resultVector, i);
         }
     } else {
-        for (auto i = 0u; i < resultVector->state->getSelVector().getSelSize(); i++) {
-            auto pos = resultVector->state->getSelVector()[i];
+        for (auto i = 0u; i < resultSelVector.getSelSize(); i++) {
+            auto pos = resultSelVector[i];
             selectedBuffer[numSelectedValues] = pos;
             numSelectedValues += isTrue(*resultVector, pos);
         }
diff --git a/test/test_files/function/case.test b/test/test_files/function/case.test
index f09a95aa39..e8935378dc 100644
--- a/test/test_files/function/case.test
+++ b/test/test_files/function/case.test
@@ -39,6 +39,12 @@ Farooq
 Greg
 Hubert Blaine Wolfeschlegelsteinhausenbergerdorff
 
+-LOG CaseBooleanReferenceTest
+-STATEMENT UNWIND [false, true] AS metric_0_value WITH *, CASE WHEN metric_0_value THEN "yes" ELSE "no" END AS label_value RETURN metric_0_value, label_value
+---- 2
+False|no
+True|yes
+
 -LOG CaseDoubleTest
 -STATEMENT MATCH (a:person) WHERE a.ID < 6 RETURN CASE WHEN a.eyeSight > 4.9 THEN a.eyeSight ELSE 1.0 END + 2.0
 ---- 4