diff --git a/build/libraries_sysmenu/TwlWireless/Makefile b/build/libraries_sysmenu/TwlWireless/Makefile
index 44c94d29..ac6eb9a0 100644
--- a/build/libraries_sysmenu/TwlWireless/Makefile
+++ b/build/libraries_sysmenu/TwlWireless/Makefile
@@ -22,6 +22,9 @@ export TWL_CODEGEN
 export TWL_ARCHGEN
 TWL_PROC					:= ARM7
 
+# always build only ARM codes under sub processes
+SUBDIR_FLAGS				= TWL_CODEGEN=$(TWL_CODEGEN)
+
 include	$(TWL_IPL_RED_ROOT)/build/buildtools/commondefs
 
 export TWL_WLAN_ROOT	= $(subst $(SPACE),\ ,$(subst \,/,$(TWL_IPL_RED_ROOT)))