diff --git a/pxr/usd/lib/sdf/data.h b/pxr/usd/lib/sdf/data.h
index 0715713bbd..10715d9a3e 100644
--- a/pxr/usd/lib/sdf/data.h
+++ b/pxr/usd/lib/sdf/data.h
@@ -68,6 +68,7 @@ class SdfData : public SdfAbstractData
     SDF_API
     virtual SdfSpecType GetSpecType(const SdfAbstractDataSpecId& id) const;
 
+    SDF_API
     virtual bool Has(const SdfAbstractDataSpecId& id, const TfToken &fieldName,
                      SdfAbstractDataValue* value) const;
     SDF_API
diff --git a/pxr/usd/lib/sdf/layerStateDelegate.h b/pxr/usd/lib/sdf/layerStateDelegate.h
index 29cd87354a..08b03ace13 100644
--- a/pxr/usd/lib/sdf/layerStateDelegate.h
+++ b/pxr/usd/lib/sdf/layerStateDelegate.h
@@ -25,6 +25,7 @@
 #define SDF_LAYER_STATE_DELEGATE_H
 
 #include "pxr/pxr.h"
+#include "pxr/usd/sdf/api.h"
 #include "pxr/usd/sdf/declareHandles.h"
 #include "pxr/usd/sdf/types.h"
 #include "pxr/base/tf/declarePtrs.h"
@@ -60,26 +61,35 @@ class SdfLayerStateDelegateBase
     , public TfWeakBase
 {
 public:
+    SDF_API
     virtual ~SdfLayerStateDelegateBase();
 
+    SDF_API
     bool IsDirty();
 
+    SDF_API
     void SetField(
         const SdfAbstractDataSpecId& id,
         const TfToken& field,
         const VtValue& value,
         const VtValue *oldValue=NULL);
+
+    SDF_API
     void SetField(
         const SdfAbstractDataSpecId& id,
         const TfToken& field,
         const SdfAbstractDataConstValue& value,
         const VtValue *oldValue=NULL);
+
+    SDF_API
     void SetFieldDictValueByKey(
         const SdfAbstractDataSpecId& id,
         const TfToken& field,
         const TfToken& keyPath,
         const VtValue& value,
         const VtValue *oldValue=NULL);
+
+    SDF_API
     void SetFieldDictValueByKey(
         const SdfAbstractDataSpecId& id,
         const TfToken& field,
@@ -87,54 +97,70 @@ class SdfLayerStateDelegateBase
         const SdfAbstractDataConstValue& value,
         const VtValue *oldValue=NULL);
 
+    SDF_API
     void SetTimeSample(
         const SdfAbstractDataSpecId& id,
         double time,
         const VtValue& value);
+
+    SDF_API
     void SetTimeSample(
         const SdfAbstractDataSpecId& id,
         double time,
         const SdfAbstractDataConstValue& value);
 
+    SDF_API
     void CreateSpec(
         const SdfPath& path,
         SdfSpecType specType,
         bool inert);
 
+    SDF_API
     void DeleteSpec(
         const SdfPath& path,
         bool inert);
 
+    SDF_API
     void MoveSpec(
         const SdfPath& oldPath,
         const SdfPath& newPath);
 
+    SDF_API
     void PushChild(
         const SdfPath& parentPath,
         const TfToken& field,
         const TfToken& value);
+
+    SDF_API
     void PushChild(
         const SdfPath& parentPath,
         const TfToken& field,
         const SdfPath& value);
+
+    SDF_API
     void PopChild(
         const SdfPath& parentPath,
         const TfToken& field,
         const TfToken& oldValue);
+
+    SDF_API
     void PopChild(
         const SdfPath& parentPath,
         const TfToken& field,
         const SdfPath& oldValue);
 
 protected:
+    SDF_API
     SdfLayerStateDelegateBase();
 
     /// Returns the layer associated with this state delegate.
     /// May be NULL if no layer is associated.
+    SDF_API
     SdfLayerHandle _GetLayer() const;
 
     /// Returns the underlying data object for the layer associated with
     /// this state delegate. May be NULL if no layer is associated.
+    SDF_API
     SdfAbstractDataPtr _GetLayerData() const;
 
     /// Returns true if the associated layer has been authored to since
@@ -192,7 +218,7 @@ class SdfLayerStateDelegateBase
         SdfSpecType specType,
         bool inert) = 0;
 
-    /// Invoked when a spec and its children are deleted from the associated 
+    /// Invoked when a spec and its children are deleted from the associated
     /// layer.
     virtual void _OnDeleteSpec(
         const SdfPath& path,
@@ -229,7 +255,7 @@ class SdfLayerStateDelegateBase
 
 private:
     friend class SdfLayer;
-    void _SetLayer(const SdfLayerHandle& layer);
+    SDF_API void _SetLayer(const SdfLayerHandle& layer);
 
 private:
     SdfLayerHandle _layer;