diff --git a/sys/talloc.c b/sys/talloc.c
index 0e3601f..2081aa9 100644
--- a/sys/talloc.c
+++ b/sys/talloc.c
@@ -12,6 +12,8 @@
  **  use it only, if your programs are already debugged !!
  **/
 
+#ifndef _MSC_VER /* MSC has no brk/sbrk */
+
 #include <stddef.h>
 #include <string.h>
 
@@ -219,3 +221,5 @@ main()
   return 1;
 }
 #endif
+
+#endif