diff --git a/mlibc/include/errno.h b/mlibc/include/errno.h
index 36e027c7..a429d58b 100644
--- a/mlibc/include/errno.h
+++ b/mlibc/include/errno.h
@@ -27,7 +27,7 @@
 #undef __MES_ERRNO_H
 #include_next <errno.h>
 #else // ! (__GNUC__ && POSIX)
-extern int errno;
+int errno;
 #endif // ! (__GNUC__ && POSIX)
 
 #endif // __MES_ERRNO_H