diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1b420c13e..3959566dd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,7 @@ set(DAGMC_VERSION ${DAGMC_MAJOR_VERSION}.${DAGMC_MINOR_VERSION}.${DAGMC_PATCH_VE
 
 if(MSVC)
   set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
+  add_definitions( -DH5_BUILT_AS_DYNAMIC_LIB )
 endif()