diff --git a/cmake/win32_compiler_options.cmake b/cmake/win32_compiler_options.cmake
index 95049b8411..d86271a8c7 100644
--- a/cmake/win32_compiler_options.cmake
+++ b/cmake/win32_compiler_options.cmake
@@ -26,11 +26,12 @@ if (MSVC)
         # numerous warnings when compiling in MSVC. We will ignore them for
         # now.
         add_definitions("/wd4290")
-	add_definitions("/wd4800")
+        add_definitions("/wd4800")
 
-        # Windows still warns about nameless struct/union, but we assume
-        # that all of our compilers support this
-        #add_definitions("/wd4201")
+        # Windows warns about integer narrowing like crazy and it's annoying.
+        # In most cases the programmer knows what they're doing.  A good
+        # static analysis tool would be better than turning this warning off.
+        add_definitions("/wd4267")
     endif()
 
     if (CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
diff --git a/include/pdal/util/Charbuf.hpp b/include/pdal/util/Charbuf.hpp
index 3ce679e410..21b9348180 100644
--- a/include/pdal/util/Charbuf.hpp
+++ b/include/pdal/util/Charbuf.hpp
@@ -46,13 +46,13 @@ namespace pdal
 /**
   Allow a data buffer to be used at a std::streambuf.
 */
-class PDAL_DLL Charbuf : public std::streambuf
+class Charbuf : public std::streambuf
 {
 public:
     /**
       Construct an empty Charbuf.
     */
-    Charbuf() : m_bufOffset(0)
+    PDAL_DLL Charbuf() : m_bufOffset(0)
         {}
 
     /**
@@ -61,7 +61,7 @@ class PDAL_DLL Charbuf : public std::streambuf
       \param v  Byte vector to back streambuf.
       \param bufOffset  Offset in vector (ignore bytes before offset).
     */
-    Charbuf (std::vector<char>& v, pos_type bufOffset = 0)
+    PDAL_DLL Charbuf (std::vector<char>& v, pos_type bufOffset = 0)
         { initialize(v.data(), v.size(), bufOffset); }
 
     /**
@@ -71,7 +71,7 @@ class PDAL_DLL Charbuf : public std::streambuf
       \param count  Size of buffer.
       \param bufOffset  Offset in vector (ignore bytes before offset).
     */
-    Charbuf (char *buf, size_t count, pos_type bufOffset = 0)
+    PDAL_DLL Charbuf (char *buf, size_t count, pos_type bufOffset = 0)
         { initialize(buf, count, bufOffset); }
 
     /**
@@ -81,7 +81,7 @@ class PDAL_DLL Charbuf : public std::streambuf
       \param count  Size of buffer.
       \param bufOffset  Offset in vector (ignore bytes before offset).
     */
-    void initialize(char *buf, size_t count, pos_type bufOffset = 0);
+    PDAL_DLL void initialize(char *buf, size_t count, pos_type bufOffset = 0);
 
 protected:
     /**
diff --git a/include/pdal/util/OStream.hpp b/include/pdal/util/OStream.hpp
index ebc64aaa79..9b2fc3b2c6 100644
--- a/include/pdal/util/OStream.hpp
+++ b/include/pdal/util/OStream.hpp
@@ -46,19 +46,20 @@
 namespace pdal
 {
 
-class PDAL_DLL OStream
+class OStream
 {
 public:
-    OStream() : m_stream(NULL), m_fstream(NULL)
+    PDAL_DLL OStream() : m_stream(NULL), m_fstream(NULL)
         {}
-    OStream(const std::string& filename) : m_stream(NULL), m_fstream(NULL)
+    PDAL_DLL OStream(const std::string& filename) :
+            m_stream(NULL), m_fstream(NULL)
         { open(filename); }
-    OStream(std::ostream *stream) : m_stream(stream), m_fstream(NULL)
+    PDAL_DLL OStream(std::ostream *stream) : m_stream(stream), m_fstream(NULL)
         {}
-    ~OStream()
+    PDAL_DLL ~OStream()
         { delete m_fstream; }
 
-    int open(const std::string& filename)
+    PDAL_DLL int open(const std::string& filename)
     {
         if (m_stream)
             return -1;
@@ -66,41 +67,41 @@ class PDAL_DLL OStream
             std::ios_base::out | std::ios_base::binary);
         return 0;
     }
-    void close()
+    PDAL_DLL void close()
     {
         flush();
         delete m_fstream;
         m_fstream = NULL;
         m_stream = NULL;
     }
-    bool isOpen() const
+    PDAL_DLL bool isOpen() const
         { return (bool)m_stream; }
-    void flush()
+    PDAL_DLL void flush()
         { m_stream->flush(); }
-    operator bool ()
+    PDAL_DLL operator bool ()
         { return (bool)(*m_stream); }
-    void seek(std::streampos pos)
+    PDAL_DLL void seek(std::streampos pos)
         { m_stream->seekp(pos, std::ostream::beg); }
-    void put(const std::string& s)
+    PDAL_DLL void put(const std::string& s)
         { put(s, s.size()); }
-    void put(const std::string& s, size_t len)
+    PDAL_DLL void put(const std::string& s, size_t len)
     {
         std::string os = s;
         os.resize(len);
         m_stream->write(os.c_str(), len);
     }
-    void put(const char *c, size_t len)
+    PDAL_DLL void put(const char *c, size_t len)
         { m_stream->write(c, len); }
-    void put(const unsigned char *c, size_t len)
+    PDAL_DLL void put(const unsigned char *c, size_t len)
         { m_stream->write((const char *)c, len); }
-    std::streampos position() const
+    PDAL_DLL std::streampos position() const
         { return m_stream->tellp(); }
-    void pushStream(std::ostream *strm)
+    PDAL_DLL void pushStream(std::ostream *strm)
     {
         m_streams.push(m_stream);
         m_stream = strm;
     }
-    std::ostream *popStream()
+    PDAL_DLL std::ostream *popStream()
     {
         // Can't pop the last stream for now.
         if (m_streams.empty())
@@ -122,71 +123,71 @@ class PDAL_DLL OStream
 
 /// Stream wrapper for output of binary data that converts from host ordering
 /// to little endian format
-class PDAL_DLL OLeStream : public OStream
+class OLeStream : public OStream
 {
 public:
-    OLeStream()
+    PDAL_DLL OLeStream()
     {}
-    OLeStream(const std::string& filename) : OStream(filename)
+    PDAL_DLL OLeStream(const std::string& filename) : OStream(filename)
     {}
-    OLeStream(std::ostream *stream) : OStream(stream)
+    PDAL_DLL OLeStream(std::ostream *stream) : OStream(stream)
     {}
 
-    OLeStream& operator << (uint8_t v)
+    PDAL_DLL OLeStream& operator << (uint8_t v)
     {
         m_stream->put((char)v);
         return *this;
     }
 
-    OLeStream& operator << (int8_t v)
+    PDAL_DLL OLeStream& operator << (int8_t v)
     {
         m_stream->put((char)v);
         return *this;
     }
 
-    OLeStream& operator << (uint16_t v)
+    PDAL_DLL OLeStream& operator << (uint16_t v)
     {
         v = htole16(v);
         m_stream->write((char *)&v, sizeof(v));
         return *this;
     }
 
-    OLeStream& operator << (int16_t v)
+    PDAL_DLL OLeStream& operator << (int16_t v)
     {
         v = (int16_t)htole16((uint16_t)v);
         m_stream->write((char *)&v, sizeof(v));
         return *this;
     }
 
-    OLeStream& operator << (uint32_t v)
+    PDAL_DLL OLeStream& operator << (uint32_t v)
     {
         v = htole32(v);
         m_stream->write((char *)&v, sizeof(v));
         return *this;
     }
 
-    OLeStream& operator << (int32_t v)
+    PDAL_DLL OLeStream& operator << (int32_t v)
     {
         v = (int32_t)htole32((uint32_t)v);
         m_stream->write((char *)&v, sizeof(v));
         return *this;
     }
 
-    OLeStream& operator << (uint64_t v)
+    PDAL_DLL OLeStream& operator << (uint64_t v)
     {
         v = htole64(v);
         m_stream->write((char *)&v, sizeof(v));
         return *this;
     }
 
-    OLeStream& operator << (int64_t v)
+    PDAL_DLL OLeStream& operator << (int64_t v)
     {
         v = (int64_t)htole64((uint64_t)v);
         m_stream->write((char *)&v, sizeof(v));
         return *this;
     }
 
-    OLeStream& operator << (float v)
+    PDAL_DLL OLeStream& operator << (float v)
     {
         uint32_t tmp(0);
         std::memcpy(&tmp, &v, sizeof(v));
@@ -195,7 +196,7 @@ class PDAL_DLL OLeStream : public OStream
         return *this;
     }
 
-    OLeStream& operator << (double v)
+    PDAL_DLL OLeStream& operator << (double v)
     {
         uint64_t tmp(0);
         std::memcpy(&tmp, &v, sizeof(v));
@@ -209,7 +210,7 @@ class PDAL_DLL OLeStream : public OStream
 class OStreamMarker
 {
 public:
-    OStreamMarker(OStream& stream) : m_stream(stream)
+    PDAL_DLL OStreamMarker(OStream& stream) : m_stream(stream)
     {
         if (m_stream.isOpen())
             m_pos = m_stream.position();
@@ -217,9 +218,9 @@ class OStreamMarker
             m_pos = 0;
     }
 
-    void mark()
+    PDAL_DLL void mark()
         { m_pos = m_stream.position(); }
-    void rewind()
+    PDAL_DLL void rewind()
         { m_stream.seek(m_pos); }
 
 private:
diff --git a/io/bpf/BpfCompressor.cpp b/io/bpf/BpfCompressor.cpp
index a7ad2265f8..df2eadd608 100644
--- a/io/bpf/BpfCompressor.cpp
+++ b/io/bpf/BpfCompressor.cpp
@@ -69,7 +69,7 @@ void BpfCompressor::startBlock()
 void BpfCompressor::compress()
 {
     // Note our position so that we know how much we've written.
-    std::size_t rawWritten = m_out.position();
+    uint32_t rawWritten = (uint32_t)m_out.position();
 
     // Pop our temp stream so that we can write the real output file.
     m_out.popStream();
diff --git a/io/bpf/BpfReader.cpp b/io/bpf/BpfReader.cpp
index a117ed0c31..db413b6833 100644
--- a/io/bpf/BpfReader.cpp
+++ b/io/bpf/BpfReader.cpp
@@ -575,7 +575,8 @@ void BpfReader::seekByteMajor(size_t dimIdx, size_t byteIdx, PointId ptIdx)
 }
 
 
-int BpfReader::inflate(char *buf, size_t insize, char *outbuf, size_t outsize)
+int BpfReader::inflate(char *buf, uint32_t insize,
+    char *outbuf, uint32_t outsize)
 {
    if (insize == 0)
         return 0;
diff --git a/io/bpf/BpfReader.hpp b/io/bpf/BpfReader.hpp
index d64dc838e0..50c5725ef2 100644
--- a/io/bpf/BpfReader.hpp
+++ b/io/bpf/BpfReader.hpp
@@ -105,7 +105,7 @@ class PDAL_DLL BpfReader : public Reader
     size_t readBlock(std::vector<char>& outBuf, size_t index);
     bool eof();
 
-    int inflate(char *inbuf, size_t insize, char *outbuf, size_t outsize);
+    int inflate(char *inbuf, uint32_t insize, char *outbuf, uint32_t outsize);
 
     void seekPointMajor(PointId ptIdx);
     void seekDimMajor(size_t dimIdx, PointId ptIdx);
diff --git a/io/text/TextReader.hpp b/io/text/TextReader.hpp
index e7c1db69f4..5b18cfe780 100644
--- a/io/text/TextReader.hpp
+++ b/io/text/TextReader.hpp
@@ -85,7 +85,7 @@ class PDAL_DLL TextReader : public Reader
       \param numPts  Maximum number of points to read.
       \return  Number of points read.
     */
-    virtual point_count_t read(const PointViewPtr view, point_count_t numPts);
+    virtual point_count_t read(PointViewPtr view, point_count_t numPts);
 
     /**
       Close input file.