diff --git a/lib_xua/module_build_info b/lib_xua/module_build_info
index 7def5758..2a36dedf 100644
--- a/lib_xua/module_build_info
+++ b/lib_xua/module_build_info
@@ -9,7 +9,7 @@
 #
 # You can also set MODULE_XCC_C_FLAGS, MODULE_XCC_XC_FLAGS etc..
 
-MODULE_XCC_FLAGS = $(XCC_FLAGS) -O3 -DREF_CLK_FREQ=100 -fasm-linenum -fcomment-asm  -fsubword-select
+MODULE_XCC_FLAGS = $(XCC_FLAGS) -O3 -DREF_CLK_FREQ=100 -fasm-linenum -fcomment-asm
 
 OPTIONAL_HEADERS += xua_conf.h