diff --git a/velox/exec/HashProbe.cpp b/velox/exec/HashProbe.cpp
index f8a820529fe8..65200c624b78 100644
--- a/velox/exec/HashProbe.cpp
+++ b/velox/exec/HashProbe.cpp
@@ -1212,11 +1212,12 @@ void HashProbe::prepareFilterRowsForNullAwareJoin(
     for (auto& projection : filterInputProjections_) {
       filterInputColumnDecodedVector_.decode(
           *filterInput->childAt(projection.outputChannel), filterInputRows_);
-      if (filterInputColumnDecodedVector_.mayHaveNulls()) {
+      if (const uint64_t* nulls =
+              filterInputColumnDecodedVector_.nulls(&filterInputRows_)) {
         SelectivityVector nullsInActiveRows(numRows);
         memcpy(
             nullsInActiveRows.asMutableRange().bits(),
-            filterInputColumnDecodedVector_.nulls(&filterInputRows_),
+            nulls,
             bits::nbytes(numRows));
         // All rows that are not active count as non-null here.
         bits::orWithNegatedBits(