diff --git a/components/external/libpng/pngconf.h b/components/external/libpng/pngconf.h
index bb0a189f9d971b678a7b5c867d4d34d453f3e783..cca0657e4cc6f74ae21f2ce3e11d8994ab957c13 100644
--- a/components/external/libpng/pngconf.h
+++ b/components/external/libpng/pngconf.h
@@ -24,10 +24,10 @@
 #define PNG_MAX_MALLOC_64K
 #define PNG_NO_STDIO
 #define PNG_NO_ERROR_NUMBERS
+#define PNG_NO_WRITE_SUPPORTED
 #define PNG_ABORT() do { rt_kprintf("libpng abort.\n"); } while (0)
 
 #ifndef RT_USING_NEWLIB
-#define PNG_NO_WRITE_SUPPORTED
 #define PNG_NO_SETJMP_SUPPORTED
 #define malloc	rtgui_malloc
 #define free	rtgui_free