diff --git a/IlmBase/config/LibraryDefine.cmake b/IlmBase/config/LibraryDefine.cmake
index 98750fc19e..2e3a052704 100644
--- a/IlmBase/config/LibraryDefine.cmake
+++ b/IlmBase/config/LibraryDefine.cmake
@@ -12,8 +12,6 @@ function(ILMBASE_DEFINE_LIBRARY libname)
   # only do the object library mechanism in a few cases:
   # - xcode doesn't handle "empty" targets (i.e. add_library with
   #   an object lib only)
-  # - under windows, we don't want the static library targets to
-  #   have the export tags
   # - if we're not compiling both, don't add the extra layer to prevent
   #   extra compiles since we aren't doing that anyway
   if(ILMBASE_BUILD_BOTH_STATIC_SHARED AND NOT (APPLE OR WIN32))
@@ -39,7 +37,7 @@ function(ILMBASE_DEFINE_LIBRARY libname)
   target_compile_features(${objlib} PUBLIC cxx_std_${OPENEXR_CXX_STANDARD})
   if(ILMBASE_CURLIB_PRIV_EXPORT AND BUILD_SHARED_LIBS)
     target_compile_definitions(${objlib} PRIVATE ${ILMBASE_CURLIB_PRIV_EXPORT})
-    if(WIN32)
+    if(WIN32 AND NOT ILMBASE_BUILD_BOTH_STATIC_SHARED)
       target_compile_definitions(${objlib} PUBLIC OPENEXR_DLL)
     endif()
   endif()
@@ -113,6 +111,7 @@ function(ILMBASE_DEFINE_LIBRARY libname)
       target_link_libraries(${libname}_static INTERFACE ${objlib})
     else()
       # have to build multiple times... but have different flags anyway (i.e. no dll)
+      target_compile_definitions(${libname} PRIVATE OPENEXR_DLL)
       set(curlib ${libname}_static)
       add_library(${curlib} STATIC ${ILMBASE_CURLIB_SOURCES})
       target_compile_features(${curlib} PUBLIC cxx_std_${OPENEXR_CXX_STANDARD})
diff --git a/OpenEXR/IlmImfExamples/CMakeLists.txt b/OpenEXR/IlmImfExamples/CMakeLists.txt
index 334691149c..bb92cdd294 100644
--- a/OpenEXR/IlmImfExamples/CMakeLists.txt
+++ b/OpenEXR/IlmImfExamples/CMakeLists.txt
@@ -35,3 +35,6 @@ install(
   DESTINATION
     ${CMAKE_INSTALL_DOCDIR}/examples
   )
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(IlmImfExamples PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/config/LibraryDefine.cmake b/OpenEXR/config/LibraryDefine.cmake
index 555b762bcd..9a5cce5456 100644
--- a/OpenEXR/config/LibraryDefine.cmake
+++ b/OpenEXR/config/LibraryDefine.cmake
@@ -12,8 +12,6 @@ function(OPENEXR_DEFINE_LIBRARY libname)
   # only do the object library mechanism in a few cases:
   # - xcode doesn't handle "empty" targets (i.e. add_library with
   #   an object lib only)
-  # - under windows, we don't want the static library targets to
-  #   have the export tags
   # - if we're not compiling both, don't add the extra layer to prevent
   #   extra compiles since we aren't doing that anyway
   if(OPENEXR_BUILD_BOTH_STATIC_SHARED AND NOT (APPLE OR WIN32))
@@ -37,7 +35,7 @@ function(OPENEXR_DEFINE_LIBRARY libname)
   target_compile_features(${objlib} PUBLIC cxx_std_${OPENEXR_CXX_STANDARD})
   if(OPENEXR_CURLIB_PRIV_EXPORT AND BUILD_SHARED_LIBS)
     target_compile_definitions(${objlib} PRIVATE ${OPENEXR_CURLIB_PRIV_EXPORT})
-    if(WIN32)
+    if(WIN32 AND NOT OPENEXR_BUILD_BOTH_STATIC_SHARED)
       target_compile_definitions(${objlib} PUBLIC OPENEXR_DLL)
     endif()
   endif()
@@ -107,6 +105,7 @@ function(OPENEXR_DEFINE_LIBRARY libname)
       target_link_libraries(${libname}_static INTERFACE ${objlib})
     else()
       # have to build multiple times... but have different flags anyway (i.e. no dll)
+      target_compile_definitions(${libname} PRIVATE OPENEXR_DLL)
       set(curlib ${libname}_static)
       add_library(${curlib} STATIC ${OPENEXR_CURLIB_SOURCES})
       target_compile_features(${curlib} PUBLIC cxx_std_${OPENEXR_CXX_STANDARD})
diff --git a/OpenEXR/exr2aces/CMakeLists.txt b/OpenEXR/exr2aces/CMakeLists.txt
index 74d9811dce..3943f6d255 100644
--- a/OpenEXR/exr2aces/CMakeLists.txt
+++ b/OpenEXR/exr2aces/CMakeLists.txt
@@ -7,3 +7,6 @@ set_target_properties(exr2aces PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exr2aces DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exr2aces PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrenvmap/CMakeLists.txt b/OpenEXR/exrenvmap/CMakeLists.txt
index beb0225be1..1363b9356b 100644
--- a/OpenEXR/exrenvmap/CMakeLists.txt
+++ b/OpenEXR/exrenvmap/CMakeLists.txt
@@ -16,3 +16,6 @@ set_target_properties(exrenvmap PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrenvmap DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrenvmap PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrheader/CMakeLists.txt b/OpenEXR/exrheader/CMakeLists.txt
index 5df8904c05..7f8438e7de 100644
--- a/OpenEXR/exrheader/CMakeLists.txt
+++ b/OpenEXR/exrheader/CMakeLists.txt
@@ -7,3 +7,6 @@ set_target_properties(exrheader PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrheader DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrheader PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrmakepreview/CMakeLists.txt b/OpenEXR/exrmakepreview/CMakeLists.txt
index cfc9e9461b..b339b3171f 100644
--- a/OpenEXR/exrmakepreview/CMakeLists.txt
+++ b/OpenEXR/exrmakepreview/CMakeLists.txt
@@ -10,3 +10,6 @@ set_target_properties(exrmakepreview PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrmakepreview DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrmakepreview PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrmaketiled/CMakeLists.txt b/OpenEXR/exrmaketiled/CMakeLists.txt
index 8b0443a1da..17ad42b0b5 100644
--- a/OpenEXR/exrmaketiled/CMakeLists.txt
+++ b/OpenEXR/exrmaketiled/CMakeLists.txt
@@ -11,3 +11,6 @@ set_target_properties(exrmaketiled PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrmaketiled DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrmaketiled PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrmultipart/CMakeLists.txt b/OpenEXR/exrmultipart/CMakeLists.txt
index f997e66038..2a2b0eb7d1 100644
--- a/OpenEXR/exrmultipart/CMakeLists.txt
+++ b/OpenEXR/exrmultipart/CMakeLists.txt
@@ -7,3 +7,6 @@ set_target_properties(exrmultipart PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrmultipart DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrmultipart PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrmultiview/CMakeLists.txt b/OpenEXR/exrmultiview/CMakeLists.txt
index 6446e2276a..72a115a705 100644
--- a/OpenEXR/exrmultiview/CMakeLists.txt
+++ b/OpenEXR/exrmultiview/CMakeLists.txt
@@ -11,3 +11,6 @@ set_target_properties(exrmultiview PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrmultiview DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrmultiview PRIVATE OPENEXR_DLL)
+endif()
diff --git a/OpenEXR/exrstdattr/CMakeLists.txt b/OpenEXR/exrstdattr/CMakeLists.txt
index c8c2158535..8b868ea0a0 100644
--- a/OpenEXR/exrstdattr/CMakeLists.txt
+++ b/OpenEXR/exrstdattr/CMakeLists.txt
@@ -7,3 +7,6 @@ set_target_properties(exrstdattr PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 install(TARGETS exrstdattr DESTINATION ${CMAKE_INSTALL_BINDIR})
+if(WIN32 AND (BUILD_SHARED_LIBS OR OPENEXR_BUILD_BOTH_STATIC_SHARED))
+  target_compile_definitions(exrstdattr PRIVATE OPENEXR_DLL)
+endif()