diff --git a/src/lib/OpenEXRCore/CMakeLists.txt b/src/lib/OpenEXRCore/CMakeLists.txt
index a3ab8ac89c..083042d3a8 100644
--- a/src/lib/OpenEXRCore/CMakeLists.txt
+++ b/src/lib/OpenEXRCore/CMakeLists.txt
@@ -90,7 +90,9 @@ openexr_define_library(OpenEXRCore
 # when building with an internal imath, this isn't generated until
 # install time, so need to use private header only include path (we
 # aren't linking to imath or anything c++)
-if (TARGET Imath::ImathConfig)
+if (TARGET ImathConfig)
+  target_link_libraries(OpenEXRCore PRIVATE ImathConfig)
+elseif (TARGET Imath::ImathConfig)
   target_link_libraries(OpenEXRCore PRIVATE Imath::ImathConfig)
 else()
   target_include_directories(OpenEXRCore PRIVATE ${IMATH_HEADER_ONLY_INCLUDE_DIRS})