diff --git a/velox/exec/fuzzer/DuckQueryRunner.cpp b/velox/exec/fuzzer/DuckQueryRunner.cpp
index 6fdf10613bb69..6b7ac7d972a96 100644
--- a/velox/exec/fuzzer/DuckQueryRunner.cpp
+++ b/velox/exec/fuzzer/DuckQueryRunner.cpp
@@ -448,8 +448,11 @@ std::optional<std::string> DuckQueryRunner::toSql(
 
 std::optional<std::string> DuckQueryRunner::toSql(
     const std::shared_ptr<const core::NestedLoopJoinNode>& joinNode) {
+  const auto& outputNames = joinNode->outputType()->names();
   std::stringstream sql;
 
+  sql << "SELECT " << folly::join(", ", outputNames);
+
   // Nested loop join without filter.
   VELOX_CHECK(
       joinNode->joinCondition() == nullptr,
diff --git a/velox/exec/fuzzer/PrestoQueryRunner.cpp b/velox/exec/fuzzer/PrestoQueryRunner.cpp
index 6c69400525b85..12772bdc3a74c 100644
--- a/velox/exec/fuzzer/PrestoQueryRunner.cpp
+++ b/velox/exec/fuzzer/PrestoQueryRunner.cpp
@@ -662,8 +662,11 @@ std::optional<std::string> PrestoQueryRunner::toSql(
 
 std::optional<std::string> PrestoQueryRunner::toSql(
     const std::shared_ptr<const core::NestedLoopJoinNode>& joinNode) {
+  const auto& outputNames = joinNode->outputType()->names();
   std::stringstream sql;
 
+  sql << "SELECT " << folly::join(", ", outputNames);
+
   // Nested loop join without filter.
   VELOX_CHECK(
       joinNode->joinCondition() == nullptr,