diff --git a/io/las/LasReader.hpp b/io/las/LasReader.hpp
index 786dc00c27..884f78ba6c 100644
--- a/io/las/LasReader.hpp
+++ b/io/las/LasReader.hpp
@@ -57,10 +57,12 @@ class PDAL_DLL LasReader : public pdal::Reader
 {
     friend class NitfReader;
 public:
-    LasReader() : pdal::Reader(), m_index(0),
-            m_istream(NULL)
+    LasReader() : pdal::Reader(), m_index(0), m_istream(NULL)
         {}
 
+    virtual ~LasReader()
+        {  destroyStream(); }
+
     static void * create();
     static int32_t destroy(void *);
     std::string getName() const;
@@ -79,7 +81,7 @@ class PDAL_DLL LasReader : public pdal::Reader
         return m_istream;
     }
     virtual void destroyStream()
-        { FileUtils::closeFile(m_istream); }
+        { FileUtils::closeFile(m_istream); m_istream = NULL; }
 private:
     LasError m_error;
     LasHeader m_lasHeader;
diff --git a/plugins/nitf/io/NitfReader.hpp b/plugins/nitf/io/NitfReader.hpp
index ed5076578e..6a4cdfb06c 100644
--- a/plugins/nitf/io/NitfReader.hpp
+++ b/plugins/nitf/io/NitfReader.hpp
@@ -73,6 +73,7 @@ typedef boost::iostreams::stream<RDevice> RStream;
         m_rstream.reset();
         m_rdevice.reset();
         FileUtils::closeFile(m_istream);
+        m_istream = NULL;
     }
 
 private:
diff --git a/plugins/oci/io/OciCommon.cpp b/plugins/oci/io/OciCommon.cpp
index d6d140590c..c3cd236141 100644
--- a/plugins/oci/io/OciCommon.cpp
+++ b/plugins/oci/io/OciCommon.cpp
@@ -71,6 +71,8 @@ Connection connect(std::string connSpec)
                 output = line;
         }
         connection = output;
+
+        FileUtils::closeFile(input);
     }
 
     Connection con;
diff --git a/plugins/oci/io/OciWriter.cpp b/plugins/oci/io/OciWriter.cpp
index 057ecd1e41..60213416fa 100644
--- a/plugins/oci/io/OciWriter.cpp
+++ b/plugins/oci/io/OciWriter.cpp
@@ -423,6 +423,9 @@ std::string OciWriter::loadSQLData(std::string const& filename)
         else
             output = line;
     }
+
+    FileUtils::closeFile(input);
+
     return output;
 }
 
@@ -715,7 +718,7 @@ void OciWriter::processOptions(const Options& options)
 
     if (m_compression && (m_orientation == Orientation::DimensionMajor))
         throw pdal_error("LAZperf compression not supported for "
-            "dimension-major point storage."); 
+            "dimension-major point storage.");
 }
 
 
@@ -917,7 +920,7 @@ void OciWriter::writeTile(const PointViewPtr view)
     if (usePartition)
         oss << ", :9";
     oss <<")";
- 
+
     Statement statement(m_connection->CreateStatement(oss.str().c_str()));
 
     // :1
@@ -940,7 +943,7 @@ void OciWriter::writeTile(const PointViewPtr view)
 
     //NOTE: packed point size is guaranteed to be of sufficient size to hold
     // a point's data, but it may be larger than the actual size of a point
-    // if location scaling is being used. 
+    // if location scaling is being used.
     std::vector<char> outbuf(packedPointSize() * view->size());
     size_t totalSize = 0;
     if (m_orientation == Orientation::DimensionMajor)