--- a/String.st	Wed Jan 27 11:56:08 2016 +0100
+++ b/String.st	Wed Jan 27 12:41:27 2016 +0100
@@ -45,8 +45,8 @@
  */
 #define INITIALIZE_WITH_SPACE
 
-#ifndef __osx__
-# ifdef FAST_MEMCHR
+#ifdef FAST_MEMCHR
+# if !defined(__osx__) && !defined(WIN32)
  char *memchr();
 # endif
 #endif