diff --git a/common/src/io.cpp b/common/src/io.cpp
index 85d6f27dc3a..8b13e740ab4 100644
--- a/common/src/io.cpp
+++ b/common/src/io.cpp
@@ -102,6 +102,8 @@ pcl::concatenateFields (const pcl::PCLPointCloud2 &cloud1,
   //by offset so that we can compute sizes correctly. There is no
   //guarantee that the fields are in the correct order when they come in
   std::vector<const pcl::PCLPointField*> cloud1_fields_sorted;
+  cloud1_fields_sorted.reserve(cloud1.fields.size());
+  
   for (const auto &field : cloud1.fields)
     cloud1_fields_sorted.push_back (&field);
 
diff --git a/visualization/include/pcl/visualization/area_picking_event.h b/visualization/include/pcl/visualization/area_picking_event.h
index 26cb217612f..eba9764da2a 100644
--- a/visualization/include/pcl/visualization/area_picking_event.h
+++ b/visualization/include/pcl/visualization/area_picking_event.h
@@ -81,6 +81,8 @@ namespace pcl
         getCloudNames () const
         {
           std::vector<std::string> names;
+          names.reserve(cloud_indices_.size());
+          
           for (const auto& i : cloud_indices_)
             names.push_back (i.first);
           return names;