diff --git a/cmake/define.inc b/cmake/define.inc
index 7cc8dc7a26a10584349ba67d560720e5464e58ab..6e64c2709abee366856a61916c6905363ea2002d 100755
--- a/cmake/define.inc
+++ b/cmake/define.inc
@@ -72,18 +72,21 @@ ENDIF ()
 IF (TD_ARM_32)
   ADD_DEFINITIONS(-D_TD_ARM_32)
   ADD_DEFINITIONS(-D_TD_ARM_)
+  ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "arm32 is defined")
   SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -g -fsigned-char -fpack-struct=8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast -Wno-incompatible-pointer-types ")
 ENDIF ()
 
 IF (TD_MIPS_64)
   ADD_DEFINITIONS(-D_TD_MIPS_64_)
+  ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "mips64 is defined")
   SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -g3 -gdwarf-2 -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 ENDIF ()
 
 IF (TD_MIPS_32)
   ADD_DEFINITIONS(-D_TD_MIPS_32_)
+  ADD_DEFINITIONS(-DUSE_LIBICONV)
   MESSAGE(STATUS "mips32 is defined")
   SET(COMMON_FLAGS "-std=gnu99 -Wall -Werror -fPIC -g3 -gdwarf-2 -msse4.2 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILE")
 ENDIF ()