diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9a3a406cc32e4ce0d3c314e2e4a5d43e17f0762b..fd361ae97434793331bafbdcaa030ff0cf56716a 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,6 +47,9 @@ IF (NOT DEFINED TD_CLUSTER)
   
   IF (TD_ARM)
     ADD_DEFINITIONS(-D_TD_ARM_)
+    IF (TD_ARM_32)
+      ADD_DEFINITIONS(-D_TD_ARM_32_)
+    ENDIF ()
   ENDIF ()
 
   IF (${CMAKE_SYSTEM_NAME} MATCHES "Linux")