diff --git a/gtsam_unstable/examples/SmartRangeExample_plaza1.cpp b/gtsam_unstable/examples/SmartRangeExample_plaza1.cpp
index 2fccf6b18..984637ef0 100644
--- a/gtsam_unstable/examples/SmartRangeExample_plaza1.cpp
+++ b/gtsam_unstable/examples/SmartRangeExample_plaza1.cpp
@@ -234,8 +234,11 @@ int main(int argc, char** argv) {
         }
       }
       countK = 0;
-      for (const auto& [key, point] : result.extract<Point2>())
+      for (const auto& key_point : result.extract<Point2>()) {
+        auto key = key_point.first;
+        const Point2 point = key_point.second;
         os2 << key << "\t" << point.x() << "\t" << point.y() << "\t1" << endl;
+      }
       if (smart) {
         for(size_t jj: ids) {
           Point2 landmark = smartFactors[jj]->triangulate(result);
@@ -256,8 +259,11 @@ int main(int argc, char** argv) {
   // Write result to file
   Values result = isam.calculateEstimate();
   ofstream os("rangeResult.txt");
-  for (const auto& [key, pose] : result.extract<Pose2>())
+  for (const auto& key_pose : result.extract<Pose2>()) {
+    auto key = key_pose.first;
+    const Pose2 pose = key_pose.second;
     os << key << "\t" << pose.x() << "\t" << pose.y() << "\t" << pose.theta() << endl;
+  }
   exit(0);
 }
 
diff --git a/gtsam_unstable/examples/SmartRangeExample_plaza2.cpp b/gtsam_unstable/examples/SmartRangeExample_plaza2.cpp
index 1e6f77b31..b7f1fb1e3 100644
--- a/gtsam_unstable/examples/SmartRangeExample_plaza2.cpp
+++ b/gtsam_unstable/examples/SmartRangeExample_plaza2.cpp
@@ -202,11 +202,17 @@ int main(int argc, char** argv) {
   // Write result to file
   Values result = isam.calculateEstimate();
   ofstream os2("rangeResultLM.txt");
-  for (const auto& [key, point] : result.extract<Point2>())
+  for (const auto& key_point : result.extract<Point2>()) {
+    auto key = key_point.first;
+    const Point2 point = key_point.second;
     os2 << key << "\t" << point.x() << "\t" << point.y() << "\t1" << endl;
+  }
   ofstream os("rangeResult.txt");
-  for (const auto& [key, pose] : result.extract<Pose2>())
+  for (const auto& key_pose : result.extract<Pose2>()) {
+    auto key = key_pose.first;
+    const Pose2 pose = key_pose.second;
     os << key << "\t" << pose.x() << "\t" << pose.y() << "\t" << pose.theta() << endl;
+  }
   exit(0);
 }