diff --git a/src/lib/OpenEXRUtil/ImfDeepImageChannel.h b/src/lib/OpenEXRUtil/ImfDeepImageChannel.h
index 85ba44bf5e..a384e9cb24 100644
--- a/src/lib/OpenEXRUtil/ImfDeepImageChannel.h
+++ b/src/lib/OpenEXRUtil/ImfDeepImageChannel.h
@@ -41,7 +41,7 @@ class SampleCountChannel;
 // of the level.
 //
 
-class IMFUTIL_EXPORT_TYPE DeepImageChannel : public ImageChannel
+class IMFUTIL_EXPORT DeepImageChannel : public ImageChannel
 {
 public:
     //
@@ -56,21 +56,21 @@ class IMFUTIL_EXPORT_TYPE DeepImageChannel : public ImageChannel
     // Access to the image level to which this channel belongs.
     //
 
-    IMFUTIL_EXPORT DeepImageLevel&       deepLevel ();
-    IMFUTIL_EXPORT const DeepImageLevel& deepLevel () const;
+    DeepImageLevel&       deepLevel ();
+    const DeepImageLevel& deepLevel () const;
 
     //
     // Access to the sample count channel for this deep channel.
     //
 
-    IMFUTIL_EXPORT SampleCountChannel&       sampleCounts ();
-    IMFUTIL_EXPORT const SampleCountChannel& sampleCounts () const;
+    SampleCountChannel&       sampleCounts ();
+    const SampleCountChannel& sampleCounts () const;
 
 protected:
     friend class DeepImageLevel;
 
-    IMFUTIL_EXPORT DeepImageChannel (DeepImageLevel& level, bool pLinear);
-    IMFUTIL_EXPORT virtual ~DeepImageChannel ();
+    DeepImageChannel (DeepImageLevel& level, bool pLinear);
+    virtual ~DeepImageChannel ();
 
     DeepImageChannel (const DeepImageChannel& other) = delete;
     DeepImageChannel& operator= (const DeepImageChannel& other) = delete;
@@ -93,7 +93,7 @@ class IMFUTIL_EXPORT_TYPE DeepImageChannel : public ImageChannel
 
     virtual void initializeSampleLists () = 0;
 
-    IMFUTIL_EXPORT virtual void resize ();
+    virtual void resize ();
 
     virtual void resetBasePointer () = 0;
 };
diff --git a/src/lib/OpenEXRUtil/ImfFlatImageChannel.h b/src/lib/OpenEXRUtil/ImfFlatImageChannel.h
index cf522abd25..a886973437 100644
--- a/src/lib/OpenEXRUtil/ImfFlatImageChannel.h
+++ b/src/lib/OpenEXRUtil/ImfFlatImageChannel.h
@@ -38,7 +38,7 @@ class FlatImageLevel;
 // only for pixels within the data window of the level.
 //
 
-class IMFUTIL_EXPORT_TYPE FlatImageChannel : public ImageChannel
+class IMFUTIL_EXPORT FlatImageChannel : public ImageChannel
 {
 public:
     //
@@ -53,24 +53,22 @@ class IMFUTIL_EXPORT_TYPE FlatImageChannel : public ImageChannel
     // Access to the flat image level to which this channel belongs.
     //
 
-    IMFUTIL_EXPORT FlatImageLevel&       flatLevel ();
-    IMFUTIL_EXPORT const FlatImageLevel& flatLevel () const;
+    FlatImageLevel&       flatLevel ();
+    const FlatImageLevel& flatLevel () const;
 
 protected:
     friend class FlatImageLevel;
 
-    IMFUTIL_EXPORT
     FlatImageChannel (
         FlatImageLevel& level, int xSampling, int ySampling, bool pLinear);
 
-    IMFUTIL_EXPORT virtual ~FlatImageChannel ();
+    virtual ~FlatImageChannel ();
 
     FlatImageChannel (const FlatImageChannel& other) = delete;
     FlatImageChannel& operator= (const FlatImageChannel& other) = delete;
     FlatImageChannel (FlatImageChannel&& other)                 = delete;
     FlatImageChannel& operator= (FlatImageChannel&& other) = delete;
 
-    IMFUTIL_EXPORT
     virtual void resize ();
 
     virtual void resetBasePointer () = 0;