diff --git a/IlmImf/ImfZip.cpp b/IlmImf/ImfZip.cpp
index 93d625e1..7268e948 100644
--- a/IlmImf/ImfZip.cpp
+++ b/IlmImf/ImfZip.cpp
@@ -42,14 +42,14 @@
 
 OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
 
-Imf::Zip::Zip(size_t maxRawSize):
+Zip::Zip(size_t maxRawSize):
     _maxRawSize(maxRawSize),
     _tmpBuffer(0)
 {
     _tmpBuffer = new char[_maxRawSize];
 }
 
-Imf::Zip::Zip(size_t maxScanLineSize, size_t numScanLines):
+Zip::Zip(size_t maxScanLineSize, size_t numScanLines):
     _maxRawSize(0),
     _tmpBuffer(0)
 {
@@ -57,19 +57,19 @@ Imf::Zip::Zip(size_t maxScanLineSize, size_t numScanLines):
     _tmpBuffer  = new char[_maxRawSize];
 }
 
-Imf::Zip::~Zip()
+Zip::~Zip()
 {
     if (_tmpBuffer) delete[] _tmpBuffer;
 }
 
 size_t
-Imf::Zip::maxRawSize()
+Zip::maxRawSize()
 {
     return _maxRawSize;
 }
 
 size_t
-Imf::Zip::maxCompressedSize()
+Zip::maxCompressedSize()
 {
     return uiAdd (uiAdd (_maxRawSize,
                size_t (ceil (_maxRawSize * 0.01))),
@@ -77,7 +77,7 @@ Imf::Zip::maxCompressedSize()
 }
 
 int
-Imf::Zip::compress(const char *raw, int rawSize, char *compressed)
+Zip::compress(const char *raw, int rawSize, char *compressed)
 {
     //
     // Reorder the pixel data.
@@ -136,7 +136,7 @@ Imf::Zip::compress(const char *raw, int rawSize, char *compressed)
 }
 
 int
-Imf::Zip::uncompress(const char *compressed, int compressedSize,
+Zip::uncompress(const char *compressed, int compressedSize,
                                             char *raw)
 {
     //