diff --git a/src/config-win32.h b/src/config-win32.h
index bfd014ef0..b9c407060 100644
--- a/src/config-win32.h
+++ b/src/config-win32.h
@@ -2,11 +2,6 @@
 /* Define if you have the stricmp function.  */
 #define HAVE_STRICMP 1
 
-#ifdef MINGW32
-/* Define to 1 if you have the `ftruncate' function. */
-#define HAVE_FTRUNCATE 1
-#endif
-
 /* Define to 1 if you want the built-in manual */
 #define USE_MANUAL 1