diff --git a/cmake/fc.cmake b/cmake/fc.cmake
index f7aa4c5c9..9feda9be3 100644
--- a/cmake/fc.cmake
+++ b/cmake/fc.cmake
@@ -3,11 +3,6 @@
 ## Description: Ported from portion of OpenBLAS/Makefile.system
 ##              Sets Fortran related variables.
 
-if (INTERFACE64)
-  set(SUFFIX64 64)
-  set(SUFFIX64_UNDERSCORE _64)
-endif()
-
 if (${F_COMPILER} STREQUAL "FLANG")
   set(CCOMMON_OPT "${CCOMMON_OPT} -DF_INTERFACE_FLANG")
   if (BINARY64 AND INTERFACE64)
diff --git a/cmake/system.cmake b/cmake/system.cmake
index bcca91c25..410cf01e5 100644
--- a/cmake/system.cmake
+++ b/cmake/system.cmake
@@ -239,6 +239,11 @@ include("${PROJECT_SOURCE_DIR}/cmake/arch.cmake")
 # C Compiler dependent settings
 include("${PROJECT_SOURCE_DIR}/cmake/cc.cmake")
 
+if (INTERFACE64)
+  set(SUFFIX64 64)
+  set(SUFFIX64_UNDERSCORE _64)
+endif()
+
 if (NOT NOFORTRAN)
   # Fortran Compiler dependent settings
   include("${PROJECT_SOURCE_DIR}/cmake/fc.cmake")