diff --git a/fortran/src/CMakeLists.txt b/fortran/src/CMakeLists.txt
index 99644b83fbb..b2ac81ea0c6 100644
--- a/fortran/src/CMakeLists.txt
+++ b/fortran/src/CMakeLists.txt
@@ -31,6 +31,12 @@ else ()
   set (CMAKE_H5_HAVE_MPI_F08 0)
 endif ()
 
+if (H5_HAVE_DARWIN) # Used in testing
+  set (CMAKE_H5_HAVE_DARWIN 1)
+else ()
+  set (CMAKE_H5_HAVE_DARWIN 0)
+endif ()
+
 # configure for Fortran preprocessor
 
 # Define Parallel variable for passing to H5config_f.inc.cmake