diff --git a/lib/libc/minimal/include/sys/types.h b/lib/libc/minimal/include/sys/types.h
index 919e4a8e369..ecdb0e3de4d 100644
--- a/lib/libc/minimal/include/sys/types.h
+++ b/lib/libc/minimal/include/sys/types.h
@@ -15,9 +15,7 @@ typedef unsigned int mode_t;
 #if !defined(__ssize_t_defined)
 #define __ssize_t_defined
 
-#define unsigned signed
 typedef __SIZE_TYPE__ ssize_t;
-#undef unsigned
 
 #endif