diff --git a/velox/exec/fuzzer/DuckQueryRunner.cpp b/velox/exec/fuzzer/DuckQueryRunner.cpp
index 6fdf10613bb6..d6d606f6497e 100644
--- a/velox/exec/fuzzer/DuckQueryRunner.cpp
+++ b/velox/exec/fuzzer/DuckQueryRunner.cpp
@@ -449,6 +449,7 @@ std::optional<std::string> DuckQueryRunner::toSql(
 std::optional<std::string> DuckQueryRunner::toSql(
     const std::shared_ptr<const core::NestedLoopJoinNode>& joinNode) {
   std::stringstream sql;
+  sql << "SELECT " << folly::join(", ", joinNode->outputType()->names());
 
   // Nested loop join without filter.
   VELOX_CHECK(
diff --git a/velox/exec/fuzzer/PrestoQueryRunner.cpp b/velox/exec/fuzzer/PrestoQueryRunner.cpp
index 0ff5021167e2..c8bba9cdb64d 100644
--- a/velox/exec/fuzzer/PrestoQueryRunner.cpp
+++ b/velox/exec/fuzzer/PrestoQueryRunner.cpp
@@ -669,6 +669,7 @@ std::optional<std::string> PrestoQueryRunner::toSql(
 std::optional<std::string> PrestoQueryRunner::toSql(
     const std::shared_ptr<const core::NestedLoopJoinNode>& joinNode) {
   std::stringstream sql;
+  sql << "SELECT " << folly::join(", ", joinNode->outputType()->names());
 
   // Nested loop join without filter.
   VELOX_CHECK(