diff --git a/packages/seacas/cmake/FortranSettings.cmake b/packages/seacas/cmake/FortranSettings.cmake
index 02864ed3..4cb8f8b8 100644
--- a/packages/seacas/cmake/FortranSettings.cmake
+++ b/packages/seacas/cmake/FortranSettings.cmake
@@ -8,6 +8,8 @@ IF ("${CMAKE_Fortran_COMPILER_ID}" MATCHES "GNU")
   SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fcray-pointer -fdefault-real-8 -fdefault-integer-8 -fno-range-check")
 ELSEIF ("${CMAKE_Fortran_COMPILER_ID}" MATCHES "XL")
   SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -WF,-D__XLF__ -qintsize=8 -qrealsize=8")
+ELSEIF ("${CMAKE_Fortran_COMPILER_ID}" MATCHES "Cray")
+  SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -sdefault64")
 ELSE()
   SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -r8 -i8")
 ENDIF()
-- 
2.18.4